Send trackId instead of subtrackId.
Add object explanation to question types directives.
Add loader interaction between request of questions to the API.
Add validation to observable group.
*Add new UI validation over practice and question layout to make content editor HTML able to be shown to the user.
Remove old way to handle panels view.

*Need a way to keep the width of the question box to be maybe 75% of the available width. it seems very skinny right now.
Merge pull request #89 from joanrm20/master

Maua client fix and improvements.
Add question stimulus back again in History Page

Create a filter to strip out the html tags.
Add the anchor that links to the question page as the entire row.
Improve the columns' responsiveness in the History Page list.
Merge remote-tracking branch 'grockit/master'