Rekordbox: Simple usability improvements

- show which songs are being analyzed in the status bar, and the progress made

- allow analysis job to be stopped

- stop creating duplicates when importing a folder of tracks

- fix UI lag, freezing, non-responsiveness, improve startup time

- allow collection to be saved with a context menu option (Traktor style)

- improve analysis time (Traktor style)

- intelligent track import - "Import Music Folders" (Traktor style)

- make memory cues more prominent and not such a secondary option - set memory cue at start of track to allow skip to start always, or add load cue point (not hot cue, memory cue) so track auto-loads to position of memory cue if required

This software could be amazing - but as a long-time Traktor user, whilst its ahead with features, those features come at the cost of stability, usability and cognitive load IMO

At the very least, analysis messaging could be more transparent ie. progress, on what track, doing what phase of analysis, and allow it to be stopped if required for a clean shutdown