* Relax assumptions about when Lua is called in foreground and background
* Start Lua cycle timer both in foreground and background
Do not assume that background/foreground alternates
* Lua is called at every Standalone GUI cycle instead of 5 Hz
Since Lua preempts every 50 ms or so, the GUI should remain responsive.
* In standalone script, only call Lua once per GUI cycle, to avoid messing up buffer handling.
* Revamped error reporting for Standalone and Telemetry Lua scripts
* Font size for Lua error is reduced from XL to L on color if LCD_W < LCD_H
* In drawTextLines, also possible linebreaks for opening brackets.
* Smaller font for error message on tall color screen
* Make titlebar height match font size on narrow LCD
