VKEYBD: Remove noisy warnings and clarify messages.
VKEYBD: Add code to open virtual keyboard on middle mouse button.

This removes the need for a hardware keyboard to trigger the use
of the virtual keyboard via F7 if using the default event mapper.

As middle button is rarely used by games, this should not cause any
conflicts. Though to avoid this possibility, the event is passed to
the engine.
VKEYBD: Modify code to open vkeybd on long press of middle mouse button.

This should massively reduce any chance of a conflict with mouse usage
in games and is still easy for a person with mobility issues to perform.
VKEYBD: Add small keyboard pack for virtual keyboard.

This pack contains just the 320x240 layout.

This is a quick way to achieve the result of a smaller keyboard
when running on 640x480 and larger games as requested bu a user.

To use this, the pack zip file, vkeybd_small.zip should be placed
in the extrapath in the same way as vkeybd_default.zip.

However, it is also necessary to set this as the active virtual
keyboard layout by adding the following linein the global [scummvm]
section of the configuration file i.e. scummvm.ini:
vkeybd_pack_name=vkeybd_small

This should be added to the GUI as a misc option, in future.

Currently, the closest layout size to the overlay size is chosen
automatically by the code in the method:
bool VirtualKeyboardParser::parserCallback_mode(ParserNode *node)

This should probably also be made configurable in future to allow
smaller keyboard sizes to be chosen.
README: Add trigger hotkeys for virtual keyboard and keymapper.
VKEYBD: Switch hotkey from F7 to CTRL-F7 to reduce game conflicts.

Although this is harder for physically disabled users to trigger, they
can now use the long middle mouse button press instead to trigger.
KEYMAPPER: Change hotkey from F8 to CTRL-F8 to reduce game conflicts.
DINGUX: Use virtual keyboard event directly, rather than using keycode.

As the virtual keyboard trigger has been moved to CTRL-F7, the previous
code which generates a unmodified F7 event to do this will not work.

Rather than just adding the CTRL modifier, this code changes the
backend to directly generate the virtual keyboard trigger event
directly. This avoids any future breakage if the key combination is
changed again.
GPH: Use virtual keyboard event directly, rather than using keycode.

As the virtual keyboard trigger has been moved to CTRL-F7, the previous
code which generates a unmodified F7 event to do this will not work.

Rather than just adding the CTRL modifier, this code changes the
backend to directly generate the virtual keyboard trigger event
directly. This avoids any future breakage if the key combination is
changed again.
LINUXMOTO: Use virtual keyboard event directly, rather than using keycode.

As the virtual keyboard trigger has been moved to CTRL-F7, the previous
code which generates a unmodified F7 event to do this will not work.

Rather than just adding the CTRL modifier, this code changes the
backend to directly generate the virtual keyboard trigger event
directly. This avoids any future breakage if the key combination is
changed again.
MAEMO: Use virtual keyboard event directly, rather than using keycode.

As the virtual keyboard trigger has been moved to CTRL-F7, the previous
code which generates a unmodified F7 event to do this will not work.

Rather than just adding the CTRL modifier, this code changes the
backend to directly generate the virtual keyboard trigger event
directly. This avoids any future breakage if the key combination is
changed again.
PS3: Use virtual keyboard event directly, rather than using keycode.

As the virtual keyboard trigger has been moved to CTRL-F7, the previous
code which generates a unmodified F7 event to do this will not work.

Rather than just adding the CTRL modifier, this code changes the
backend to directly generate the virtual keyboard trigger event
directly. This avoids any future breakage if the key combination is
changed again.
SAMSUNGTV: Use virtual keyboard event directly, rather than using keycode.

As the virtual keyboard trigger has been moved to CTRL-F7, the previous
code which generates a unmodified F7 event to do this will not work.

Rather than just adding the CTRL modifier, this code changes the
backend to directly generate the virtual keyboard trigger event
directly. This avoids any future breakage if the key combination is
changed again.
TIZEN: Use virtual keyboard event directly, rather than using keycode.

As the virtual keyboard trigger has been moved to CTRL-F7, the previous
code which generates a unmodified F7 event to do this will not work.

Rather than just adding the CTRL modifier, this code changes the
backend to directly generate the virtual keyboard trigger event
directly. This avoids any future breakage if the key combination is
changed again.
WII: Fix correct keycode for virtual keyboard trigger.

As the virtual keyboard trigger has been moved to CTRL-F7, the previous
code which generates a unmodified F7 event to do this will not work.

However, due to the complexity of this code, directly calling the
virtual keyboard trigger event could have side effects, so have instead
just added the CTRL modifier to fix this.

This should be fixed if possible to use EVENT_VIRTUAL_KEYBOARD.
ANDROID: Fix correct keycode in keymapper for virtual keyboard trigger.

As the virtual keyboard trigger has been moved to CTRL-F7, the previous
code which generates a unmodified F7 event to do this will not work.

However, due to the complexity of this code, directly calling the
virtual keyboard trigger event could have side effects, so have instead
just added the CTRL modifier to fix this.

This should be fixed if possible to use EVENT_VIRTUAL_KEYBOARD.
SDL: Default to 44kHz sound output.
PS3: Default to 44kHz sound output.
README: Remove Keymapper trigger key note, add Vkeybd mouse button note.

As the keymapper is still WIP/unstable, this should be omitted from user
documentation. Added note on mouse button trigger for virtual keyboard
as this was not noted in any user documentation.
MAEMO: Add "small" virtual keyboard pack to port packaging.