For #2034 - "Knowledge map can't be scrolled" - this is the initial fix to allow user to scroll horizontally if the contents of the map is more than its container's width.
Remove codes to set the `overflow` CSS attribute of the map container and set it's value to `auto`.
Merge pull request #2101 from cpauya/hotfix/2034-Knowledge-map-cant-be-scrolled

Hotfix/2034 knowledge map cant be scrolled
skip password length enforcement test
Prevent reflected XSS by sanitizing messages passed as GET params.
Fix syntax error in JavaScript for single-facility form display logic.
Add title tag & better image for partially completed exercises to knowledge map.
Merge branch 'nalanda-rct2' into nalanda
Merge branch 'nalanda' into playlists
Wrap `json.load` into an exception handler so we don't get exception if file is non-existent.
Make playlist sidebar scrollable.
Include default points of "0" for ExerciseLogModel, to avoid errors.
Only allow, and use by default, JSON in tastypie.
move playlist loading and playlist entry data cleaning into its their
respective models instead of the API resource class
move plain object Playlist and PlaylistEntry into playlist/models.py
Merge branch 'nalanda-rct2' into feature/2122-Exam-list-page

Conflicts:
	kalite/student_testing/views.py
fix the fetching of playlist entry IDs
add management command for checking the validity of playlist entries
add missing fields to make the admin created by CreateAdminMixin to be a superuser
Related video links on exercise view working again.