Issues with translations that use ampersand (&)

[korcankaraokcu]

As reported in #221, translations for QPlatformTheme context does not work if the entry uses ampersand (&)

[korcankaraokcu]

Spent some time on this. Tried out these silly things:

• Using & in source strings
• Creating a class named QPlatformTheme and using QT_TR_NOOP for translation strings

None of them worked but still wanted to share so others don't lose time with these silly ideas