mytharchivehelper: quote the file names passed to mythutil

This fixes a bug were copying files using mythutil would fail if the file names
passed as arguments contained spaces and were not delimited with quotes.
Miscellaneous translation fixes

Context changes.
Concatenated string fixes.

PS: Let's hope this ocmpile on Mac since I can't test the block of code that is only compiled on Darwin...
Remove the translation in this commented out block, lupdate
doesn't understand this block is commented out...
Updated Norwegian Bokmal MythFrontend, MythArchive, MythBrowser,
MythGallery, MythGame, MythMusic, MythNetvision, MythNews,
MythWeather and MythZoneMinder translation
from Rune Evjen.

Thank you Rune!

Closes #11716
Translation context chsnges and addition of comments
Parse additional directories for translatable strings
Translation context changes
Translation context changes
Translation context changes
Translation context changes
Remove redundant QObject:: prefix, those classes already inherit from QObject...
Miscellaneous translation fixes

Remove additionnal QObject::

Add some more common strings.

This will have to be revisit, some strings are concatenated in there...
Commit the header for the previous commit...
Revert "Check return value of FindThemeFile() when loading an image."

This reverts commit 0d75bebc751e3e669192379eec0a4a7fc722a76c.
Only search theme path for local images.
Translate two strings which were previously untranslatable in mythmusic.
Reduce flashing of images when moving through a buttonlist.

Refs #11717
Don't clear a MythUIImage widget if the new image is coming from the
cache, makes for a smoother transition.

Refs #11717
Don't display the new button state until we've finished populating it
with the new values. Fixes another visual irritation.

Refs #11717
Don't force background loading for remote images if they are already
in the memory cache

Refs #11717