applets/kicker: make group upper case for Han/Katakana
Reason for the change
Similar to d4a2cd18
Kicker backend transliterates Chinese initial characters in app names to set the group, so that they are alphabetically listed under the corresponding Latin character. It uses the lower-case form of the letter though, which breaks Kickoff's custom ListOfGridsView sections which require them to be upper case, as opposed to the regular ListView, which collates upper and lower case letters on its own. Similarly for apps starting with Japanese Katakana characters.
Instead, return the upper-case version of the letter, just like we now do for apps with lower-case Latin initial letters.
Test plan
- Install an app that has a name starting with Chinese characters in zh_CN locale (like Kalk, 计算器, should be listed under J)
- Set kickoff to show all apps in grid style
- Start Plasma with LANGUAGE=zh_CN, look for Kalk under J (or anywhere)
Screenshots or screen recordings
N/A