For #1416: xf:dispatch/xf:show actions support properties

- XForms actions have supported properties for a long time
- this adds support to simple processes
#1416 “FB: Use buttons and processes for buttons”

- FB buttons controlled by property
- add processes for close/new/test/publish/save
- model.xml
  - fb-publish-dialog
  - fb-publish-form
- move FB-specific triggers instance to FB
  - use event to communicate state
- resources
  - move buttons to top-level
  - backward compatibility in ResourcesPatcher
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