Add bounds check to MarkingSpacesControlViewModel
Merge branch 'master' of github.com:IMDC/LiveDescribe-Desktop into valdev
Enable and disable textboxes for selected Caption
Add Binding Commands for Marker Buttons
Fix Marker Setting Issue

Setting the Marker in the timeline no longer deselects the selected
space.

Some refactoring was done to clean up interaction between the UI
elements.
Fixing heights
Add GetNewSpaceTimeCommand

Use command instead of click handler on AudioCanvas
Refactor DescriptionRecordingControl

Add text to checkbox among other things.
Add ValueConversion attributes to converters
horizontal time line scroll bar is always visible