Settings bug: Strip audio resets codec selection

[PeterDekkers]

Seems to be a small UI bug possibly. Confirmed in versions 1.5.3 and 1.6.9.1.

To reproduce:

1. Click Load saved settings and select Hap
2. Click Settings...
3. Choose Strip audio tracks from files
4. Click Close Settings

Upon encoding any file the Hap codec is not used. The resulting file size is huge and the resulting codec is:

I randomly managed to get the correct codec to apply by clicking around the interface for a bit. I can't seem to reproduce this "workaround" again though, but it went something like this:

1. Click Load saved settings and select Hap
2. Click Settings...
3. Choose Strip audio tracks from files
4. Select another codec, e.g. H264
5. Select Hap again
6. Click Close Settings

This leads me to believe that the bug is somehow tied to the UI. Please let me know if I can provide any further information.