JS/submitForm: Choosing the right submit button in FF

refs #7751
Dashboard: Change component form

refs #7751
Dashboard: Update descriptions

refs #7751
Dashboard: Remove unused template

refs #7751
Dashboard: Rename component to dashlet

refs #7751
Dashboard: Convert table into an action table

refs #7751
Dashboard: Fix tests

refs #7751
Merge remote-tracking branch 'origin/master' into bugfix/dashboard-rework-7751
CSS: Improve forms (at least a bit :))
Merge remote-tracking branch 'origin/master' into bugfix/dashboard-rework-7751
Merge branch 'bugfix/dashboard-rework-7751'

resolves #7751