Tracking: clear points when new tracking started

Currently, stopping the tracking clears the path. The path should be only cleared when starting a new tracking.

added Ready label

added 1.0.0 label

changed the description

added In progress label and removed Ready label

added Ready label and removed In progress label

added In progress label and removed Ready label

assigned to @andrijoos

created branch 6-tracking-clear-points-when-new-tracking-started to address this issue

mentioned in merge request !8 (merged)

added Review label and removed In progress label

mentioned in commit 09eacf01

closed with merge request !8 (merged)