enhanced UI: improved styling for main window, tabs, and controls; updated...

enhanced UI: improved styling for the main window, tabs, and controls; updated colour scheme and added visual effects; added scroll bar; added distance selection;

requested review from @mhby1g21

assigned to @mhz1g21

removed review request for @mhby1g21

approved this merge request

approved this merge request

merged

mentioned in commit e74103c3