Minor refactoring
Fix Summary delete dialog title

This regressed after we introduced icons in the resources.
More fixes for #885 "Universal send button"

- support sub-processes with process("my-process") or simply "my-process"
- use "require-valid"
- "validate" just validates and fails if invalid
- "visit-all" and "unvisit-all"
- FB uses processes for "Save As" and initial "Home" buttons
- "validate" supports optional attribute to specify legacy property
- FB-specific resource for "save-as"
- refactoring and clean-up
Persistence: pass "valid" URL parameter