[Bug]: `KryptonForm`'s 'InternalPanel' designer issues

[PWagner1]

Over the last few alpha builds, it is noticed that the KryptonForm's 'InternalPanel' is causing designer issues where controls cannot be dragged and dropped to it in the designer.

[PWagner1]

Something happened in the last week of August, between builds .237 & .244...

[giduac]

cc: @ALL
Please note that is probably connected/caused by 648 (themed menu) .
Also the first merge of 648 exhibits this behaviour. Before 648 all was functioning fine.

648 has been reopened for this.

[PWagner1]

@giduac, @Smurf-IV, @tobitege

Please evaluate PR #2489

[tomdobing]

I understand this might not be the right place, @PWagner1, but I’d like to know if there’s a workaround for this issue. Additionally, could you provide an estimated time for when a fix will be available? Thank you!