Take "OK", "Quit", etc. from qt file

[scootergrisen]

I am currently translating Avidemux to danish and i see some strings for buttonnames and stuff like "OK" and "Quit" and "Cancel" and "Alt+Return" and stuff like that, that i would think would be better to take from the QT translation where the strings have properly been translated for common things like button names and stuff like that.

So i suggest maybe taking the strings for the qt_xx_xx.qm file.

Here are some of the strings i have found that i think could be taken from qt translation:

Code Select Expand

width
height
OK
Quit
Cancel
Alt+Return
Ctrl+Return
F7