Have an enhanced Experimental theme v2

* Have beautiful widgets
* Have beautiful feedbacks
* Project privacy tooltip
* Avatars unification (round shape everywhere)

Change-Id: I601acaed4d045a32c26f9bf758677ca6103e2a67
Have an enhanced Experimental theme v2 suite:

* AgileDashboard: not broken when I use a laptop or when I collapse the sidebar
* Fixing navbar height/content padding issue
* Beautiful sidebar
* Navigation: where am I when I collapse the sidebar?

Change-Id: I52ae43da1854341f414c17e0b99cfb926e16d704
Have access to snippets & extra tabs; updating incoherant help menu

Change-Id: I6eed5e106d02839a38c272e5418426bf041dd791
Have an enhanced Experimental theme v2 again

* Navigation: remove home and limit project width from navbar
* AgileDashboard: planning view not broken in 1024x768
* Sidebar flickering

Change-Id: Ic6dbc065874ba025510aaf023d0b48a594cb6fd4
Merge remote-tracking branch 'mother/master' into HEAD

Change-Id: I49c0454a0cc0b29174513aecf03518b2ca567427
Merge remote-tracking branch 'bender/6008_enhanced_experimental_theme_v2' into HEAD

* bender/6008_enhanced_experimental_theme_v2:
  Have an enhanced Experimental theme v2 again
  Have access to snippets & extra tabs; updating incoherant help menu
  Have an enhanced Experimental theme v2 suite:
  Have an enhanced Experimental theme v2

Change-Id: Ie4a476693706b11fbedb81e984de165289939880
This is Tuleap 6.12.99.9

Change-Id: I5cd8ea2ce82ce37628eaf2e3793165911345f5e2