Stop Motion controls: Opacity value decreases when changing tabs.

[gab3d]

How to reproduce:

• Open the Stop Motion Controls panel.
• Go to the Light tab.
• Activate "Blackout all Screens" option.
• Change to Motion tab. [Opacity value decreases by 1 unit]
• Change back to Light tab. [nothing happens]
• Change to Options tab. [Opacity value decreases by 1 unit]

Note 1: I can't always reproduce it, but most of the times it does show up. Note 2: It doesn't happen just with the activation of the "Blackout all Screens" option, I've tested it also with "Time Lapse" option with the same results (in that case you go from the Options tab to the others and back.

[shun-iwasawa]

I think I need to get familiar with the stop motion feature and port remaining bug-fixes from Tahoma2D before investigating this..