This commit also includes some additional major changes.
- Return U32String from TransMan getTranslation()
- Change tooltips to be U32Strings
- Remove temporary code of convertToU32String
- U32 Support various dialogs (Browser, FileBrowser, Messages, Chooser, etc)
- U32 for music plugins
- U32 for OSD messages
- Add some helper functions to ustr.cpp
- Change default tooltips from nullptr & 0 -> ""
- Some runtime exceptions may occur when changing languages due to incorrect String::Format
No wait when "Go up" is pressed. These contents could be invalid,
though. In order to refresh contents, one has to go up one more time and
then get back inside (in root folder - just press "Go up" to refresh
it).
