Fix for #374 - make exercise display name the exercise title in tabular coach report.
Merge branch 'release-0.10' of github.com:learningequality/ka-lite into release-0.10
Fix for #466, show [no groups] in group selection navbar when facility has no groups.

Reinstated previously removed +1 from adjustment for header row height for user list table.
Merge pull request #514 from rtibbles/coach_reports_fixes_0.10

Use exercise titles in tabular coach report, add [no groups] indicator for group selector navbar in coach reports.