Changes to game shortcuts and UTF8 gamelist name fixes

[capitalistspz]

• Windows icons are stored as .ico files to %LOCALAPPDATA%/Cemu/icons/
• Long title names chosen as some games (NSMBU + NSLU) add trailing dots for their shortnames
• Long title names have their newlines replaced with spaces at parsing
• Linux shortcut paths are saved with UTF-8 encoding
• Game titles are copied and saved with UTF-8 encoding

[Exzap]

I think it's better to introduce a reusable ActiveSettings::GetRealExecutablePath instead of hardcoding the appimage path handling here.

[capitalistspz]

Considering that ActiveSettings::GetExecutablePath is only used for shortcuts and the autoupdater, maybe it simply should be the executable path?

[Exzap]

yes, that makes more sense

[lijunyu-cn]

For multi-charset systems, there may be some issues with newly created shortcut names, and the same problem occurs when copying the Title Names. Could you fix it in this PR, I tried using wxString::FromUTF8(gameInfo.GetTitleName()) in Win10 to solve this problem, but this is just a small issue, not worth opening a separate PR.