When ScummVM is started, if the updates_check value is not defined
in the config file and ScummVM was compiled with the Updates feature
(on macOS or Windows), an opt-in dialog asks the user if he wants
to check for available updates periodically. This should only be
shown once. However as ConfMan was not flushed to disk, it was
asked again the next time ScummVM is started, and again, until the
user accessed the options to change something else and this was
finally flushed to disk.
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
