Hide concrete5 version number in upgrade page

If the constant APP_VERSION_DISPLAY_IN_HEADER is set to false,
unregistered visitors can still determine the currently installed
version by visiting the page /index.php/tools/required/upgrade.
Let's hide the version number when APP_VERSION_DISPLAY_IN_HEADER is
set to false.
fixed disappearing pane header icons in chrome on click
reverted change and moving to the less file
really fixed disappearing pane header icons in chrome on click
Remove duplicate body reset

This line is called twice in the reset function:
$this->body = '';
Declare template variable as an empty string
Fix resetting template variable in reset method
Inherit page speed settings
Raise an event after a user has been deleted

Currently we have the on_user_delete event: it can cancel the deletion of
a user.
This is fine, but we don't have an event that's being raised when a user
is effectively deleted.

Let's add it...
Raise an event after a user has been deleted v2

Currently we have the on_user_delete event: it can cancel the deletion of
a user.
This is fine, but we don't have an event that's being raised when a user
is effectively deleted.

Let's add it...
Added simple css hooks for attribute type and name

Give some basic css hooks for people to style things like checkboxes, textareas and even specific elements if needed.
reverted unneeded css change
Merge branch 'master' of github.com:zanedev/concrete5
Fix copy and paste issue with classes string
Only query PackageList when pkgHandle not set
Fix indentation and spaces
Remove unused vars
From multiple 'if' to 'switch'
Fix html charset
Add thead, tbody, th