Search and Grouping Feature

[ipa-danb]

• Bug fix: Deleted Frames not beeing able to be reused
• Chore: Moved from prints to rospy logging
• Feature: Added search bar for both tf and frame list (style: grey out or hide frames with argument --filter_style) (Addresses Last used frames on top #13 )
• Feature: Add Grouping Option for frames by setting the group attribute in the yaml file
• Feature: TF Frame list is automatically grouped by self-defined (Frames) and external frames (Other)
• Feature: Clear Frame Buffer and Added loading animation for tf frame list when pressing either refresh button or deleting frames
• Feature: Automatically Update TF Frame List when adding/duplicating frames (without clearing the frame buffer)