Fixing issues in the alignment select in Media Edit dialog

Fixing the behavior of alignment select and checkbox in the edit
dialog. Adding a check on all UI events to make sure they update
the model only if the model value is different than the UI value.

Also adding the ability to check the default direction of a
specific node type, to predict default alignment values.

Bug: 65916
Change-Id: I82f624fa788383dec0a12afb473aef01593e670e
Merge "Fixing issues in the alignment select in Media Edit dialog"