DataTranslations: remove SetExplicitMinSize

It prevents the window to get big enough for some of the translators.

Fixes #11612.
FileTypes: make space for BBox titles

In some locales the title is longer than the space there is for it. Make
sure the boxes are wide enough for the title to display completely.

Fixes #11611.
BOptionPopUp: call the superclass AttachedToWindow.

It's ther that the view background color is inherited from the parent.
Fix option popups having a white background eg. in MediaPlayer
preferences.

Thanks to DeadYak for noticing the problem.