Added context menu to app icon in ActivityApp

Workaround for #877
Translated new strings and modified one in case the function has changed.
Reduce GPU overdraw
Updated limitations
Merge pull request #891 from jokies/patch-1

Translated new strings and modified one in case the function has changed...
Launch context menu on click and remove from options menu
Merge pull request #894 from ngonchan/master

Updated string translations.
Updated changelog
Merge pull request #892 from jpeg729/gpu_overdraw

Reduce GPU overdraw
Whitespacing
Updated changelog
Server: revise menu
Server: fix character set
Server: applications by first letter
Server: display total number of applications
Server: fix application names starting with zero
Server: compatibility
Server: character sets
Server: generate letters
Server: fix 'other'