tasks #7138 Title size change when changing color theme in my account page

This is a part of story #6003 be able to change the Experimental theme color

 * Fix title size
 * Fix padding

Change-Id: I628ecd991c3d0d1aa9142dcbfb556912e7672970
Merge commit 'refs/changes/02/2702/3' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  tasks #7138 Title size change when changing color theme in my account page
This is Tuleap 7.2.99.12

Change-Id: Ic9c097c56fc9df650cb3d1536abf1ab534ce259f