Fix visualization, fix human obstacles

Make visualization of LocalPlanner a ScopedClient so the layers are removed automatically when the navigator is stopped.

Fix proxemic zone generation and visualization of proxemic zones.

added hiwi local-planning labels

assigned to @groegerto

requested review from @fabian.reister

added 7 commits

• b34891b1 - 1 commit from branch dev
• 428e7ccb - Merge branch 'feature/fix-visualization' into test
• 05569ad6 - Fix offset paramter
• a59775fe - Use velocity in m/s for stretching
• 1fd9cb56 - Fix proxemic zone visualization, draw them in different colors
• 0e2a263a - Normalize angle in ros conversions
• 9286eebd - Add some comments

Compare with previous version

changed title from Fix visualization to Fix visualization, fix human obstacles

changed the description

approved this merge request

mentioned in commit d928c26f

merged