GUI-641: Adjust spacing for form fields on create scaling policy page and remove unneeded tabs.
GUI-641: Use more detailed selector for initial form input focus, since the both the page and the dialog has an input#name field.
GUI-641: Build choices for instances and volumes in create alarm dialog from form choices manager rather than metric dimensions to avoid validation errors.
GUI-641: Select unit choice based on metric choice.
GUI-641: Offset display of unit drop-down, and don't display "Count" as a unit.
Merge pull request #453 from eucalyptus/GUI-641

GUI-641: Selective display of units for Create Alarm dialog