Final UI polishing about pepr3d HOT 2 CLOSED

In https://github.com/tomasiser/pepr3d/tree/hojdy/error-dialogs

Provide warning & error & fatal error dialogs for tools:

• Triangle Painter - AFAIK no dangerous places
• Paint Bucket - bucket painter can throw an error if CGAL fails inside. Added the dialog.
• Automatic Segmentation - added 2 dialogs - SDF computation and segmentation
• Manual Segmentation - added 2 dialogs - SDF computation and bucket spreading of colors
• Geometry - Added throws on multiple places
• Save - added two dialogs for when the ofstream is not open (checked with .is_open)

Import and Load should be fine as there are plenty of error dialogs.
Export looks to be handled via Assimp, so no Dialogs there?
Settings contains the width of the sidepane and ColorPallete management. Sidepane should not fail, and ColorPallette looks to already have dialogs inside.
Display Options contains camera management which looks without possible errors, and model translation/rotation which looks without errors.
Information ...

I think that this is done.

from pepr3d.

Depending on how @Arokip handles the new Export, we should probably at least try to handle exceptions so they do not crash the whole Pepr3D. Let's wait for that.

from pepr3d.