Strange bahaviour of suffix in GUI

[HauptlingHD]

Opening a separate issue after #1222 since I have probably discovered a different bug.

In the GUI, the "suffix" option in the "Encoding Options" category is populated with the suffix of the Input file by default, or it should be, I guess.

However, the way this is currently handled leads to issues, if there are multiple dots in a filename.

Example:

File Name:

001. Warum betreibt man Astronomie (27.09.98).avi

Auto generated Suffix:

. Warum betreibt man Astronomie (27.09.98).avi

The behavior should be changed, so the suffix is separated by only the last dot in a file. Maybe the program could just search for the dot backwards?

[k4yt3x]

Yeah I saw that in a few cases. Looks like I broke the suffix search when I did the overhaul. I'll have it fixed.

[k4yt3x]

I fixed it, then decided to disable it and just fix it to .mkv for better compatibility. Will be in the next release.