touchscreen/skin_engine: The touchregion handler didn't handle that vertical bars are bottom-up by default

Change-Id: I4e7fc451c7ba318acb110c587bff4306c393e09f
put_line(): Do not lock up if the scroll engine runs out of lines.

Allocate MAX_LINES+1 because at the time get_line_desc() is called
the scroll engine did not yet determine that it ran out of lines
(because puts_scroll_func() wasn't called yet. Therefore we can
run out of lines before setting the used field. By allocating
one item more we can survive that point and set used to false
if the scroll engine runs out of lines.

Change-Id: I7a9af1bce256c6e07d254f096bd5865fa7cf2cee
skin_engine: New param "noborder" for the bar tags.

By specifying this param the bar will not have a border/box. Instead
the inner part that fills up is maximized on the bar area.

Note that this only affects bars using foreground and background colors,
not those constructed with images.

Change-Id: Ib8dd49ecbaf9e16b96de840f5f365871b73d4fa4
put_line(): Fix buffer overflow.

At the end of the format string it wrote a last byte (or inline string) past
the end of the lcd boundaries, potentially overwriting unrelated memory. It
now makes sure it won't exceed the viewport's width.

Change-Id: Id4cfce918e8b070b7fc3c7d33f389f7a171963ff
put_line(): Add another check against possible buffer overflow (see 193911a).

Change-Id: Idc6637cc42afe612375dab3acac8495278f68f0a
scroll_engine: Fix FS#12894: Text scrolling stops working after a few seconds/minutes

Since commit 706b920 a timeout of TIMEOUT_BLOCK (-1) will cause
queue_event_w_tmo() block indefinitely (previously it behaved as
TIMEOUT_NOBLOCK).  scroll_process_message() can be called with negative
timeouts, with luck also -1.

To fix this convert all negative timeouts to TIMEOUT_NOBLOCK explicitely.

Change-Id: I1fc20d93acbba50d713c8364f635365930b38cbf
fuze+: Fix pitchscreen keymap.

Like on other targets, left/right should change by 2% only temporarily.
In timestretch mode fast speed change was not available.

Fixes FS#12900.

Change-Id: I8819c2ae7266bc09565b5ef13055985acf483f98
skin_engine: Stricter checking for x, y, width, height for bar tags.

Every theme that doesn't parse anymore now has broken values. I hope it's not
too many of them.

Change-Id: I6f52e55dc9197d0919f854240723a88f99c0b7da
manual: Update bar tags for new noborder parameter and default value for y.

Change-Id: I4587ed5f073bd66d4efdf925b7beeca9a8b14a07
Improve wording.

Change-Id: I2e59fe8eb2d71968586fb035250978c90a619f76