OpenPandora Main OS

Built-in keyboard input is a central thing on the Pandora, as it concerns almost all user interfaced apps!
I realized that I myself and also others submitted quite many reports concerning this issue.
Hence this meta issue is intended as an overview/accumulation/aid for those devs who are willing to overwork the whole issue.
If you realize new related issues, feel free to add them here.
If this my effort is contradicting the OpenPandora workflow, then pardon me, and instruct me, how else to handle issues of that kind. Thanks!

Keyboard low level: Driver, keyboard layout, post processing (hotkeys, input support, etc)
FS#138 FS#227 FS#242  FS#259 

Keyboard mid level: Application interfacing
 FS#102  FS#123 FS#238

Keyboard application internal level
 FS#157  (dupe:  FS#249 ) FS#243 FS#256