Right-click on language bar glyph gives inappropriate context menu

[abrudz]

Currently, a right-click on a language bar item gives a context menu with editing commands (copy/cut/paste…) which is completely inappropriate.

[mkromberg]

I removed the enhancement tag, the project to make language bar texts more sophisticated is separate.

[e9gille]

The context menu is currently added to the root window object. I'll change that and set it explicitly on the areas where it makes sense.