UI improvements

[odeimaiz]

What do these changes do?

• Tooltips on zoom buttons
• Thumbnails take maximum the space they get
• Sweeper button to WorkbenchToolbar
• e2e: throw error if service doesn't start after timeout
• e2e: catch errors in p2e
• removed fake frontend categories (Postpro, Notebook, Solver, Simulator, Modeling, Data)

Related issue/s

closes ITISFoundation/osparc-issues#396
closes ITISFoundation/osparc-issues#387

[codecov]

Codecov Report

Merging #2109 (5b4395f) into master (5d21604) will decrease coverage by 0.0%.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           master   #2109     +/-   ##
========================================
- Coverage    73.7%   73.7%   -0.1%     
========================================
  Files         454     454             
  Lines       16794   16794             
  Branches     1670    1670             
========================================
- Hits        12387   12386      -1     
  Misses       3961    3961             
- Partials      446     447      +1     

Flag	Coverage Δ
integrationtests	65.4% <ø> (-0.1%)	⬇️
unittests	67.3% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...webserver/computation_comp_tasks_listening_task.py	87.6% <0.0%> (-3.4%)	⬇️
...simcore_service_webserver/projects/projects_api.py	84.5% <0.0%> (-0.6%)	⬇️
.../director/src/simcore_service_director/producer.py	61.1% <0.0%> (+0.6%)	⬆️

[KZzizzle]

sweet