Get rid of the doc & seqtext fields, as they are not actually used (nor
are they particularly useful, the event handler's name should be pretty
self-explanatory).
Also, tweak the key_events documentation to highlight the quirks of the
API, especially as far as array nesting is involved...
Random drive-by cleanup of the declarations of key_events & ges_events
to re-use the existing instance object (now that we know they're sane
;p) for tables with a single member (less GC pressure).
* This removes support for the following deprecated constants: `DTAP_ZONE_FLIPPING`, `DTAP_ZONE_BOOKMARK`, `DCREREADER_CONFIG_DEFAULT_FONT_GAMMA`
* The "Advanced settings" panel now highlights modified values in bold (think about:config in Firefox ;)).
* LuaData: Isolate global table lookup shenanigans, and fix a few issues in unused-in-prod codepaths.
* CodeStyle: Require module locals for Lua/C modules, too.
* ScreenSaver: Actually garbage collect our widget on close (ScreenSaver itself is not an instantiated object).
* DateTimeWidget: Code cleanups to ensure child widgets can be GC'ed.
FocusManager: fix round x use y layout
FocusManager: add tab and shift tab focus navigation support
FocusManager: handle Press key by default
FocusManager: make sure selected in instance level
FocusManager: add hold event support
FocusManager: Half move instead of edge move
FocusManager: add keymap override support
FocusManager: refocusWidget will delegate to parent FocusManager
Focusmanager: refocusWidget can execute on next tick
inputtext: can move out of focus on back
inputtext: fix cannot exit for non-touch device
inputtext: fix cannot input text with kindle dx physical keyboard
fontlightwidget: add non-touch support
datetimewidget: add non-touch support
datetimewidget: fix set date failed in kindle DX, fix datetimewidget month range to 1~23 by default
datetimewidget: make hour max value to 23
multiinputdialog: add non-touch support
checkbox: focusable and focus style
virtualkeyboard: no need to press two back to unfocus inputtext
virtualkeyboard: collect FocusManager event key names to let VirtualKeyboard disable them
openwithdialog: add non-touch support
inputdialog: can close via back button
enable all InputDialog and MultiInputDialog can be close by back
keyboardlayoutdialog: non-touch support
readertoc: non touch device can expand/collapse in toc
bookstatuswidget: non touch support
keyvaluepage: non-touch support
calendarview: non-touch support
