Begin write a form editor, using the form library for sure :)
Form Element Select: new element type
Form Element: If 'check' is defined, call suiting function
Form Element Text: Introduce check 'regexp'
Form: Bugfix converting count -> array
Values-Editor for checkbox/radio/select
Form Element: Implement 'and', 'or', 'not' for check
Form Element: 'check' checks another element for a value
Form Element: Implement check 'and', 'or', 'not', 'check' for JS
Form Element: Implement check 'is' (PHP/JS)
Form Element *: Bugfix: pass this to this.parent.XYZ.call()

Conflicts:

	inc/form_element_array.js
	inc/form_element_checkbox.js
	inc/form_element_form.js
	inc/form_element_radio.js
	inc/form_element_select.js
	inc/form_element_text.js
Form Element: check for validity after changing value (JS)
Form Element: cfg 'show_depend': show element only if expr returns true
Editor: show values array only for certain element types
Form Element: refresh() is called on every element in form when notified of a change
Rethink check_modified / notify_change / refresh
Fix refresh() if no dom_element/dom_values exist
Form Element: Every element gets a reference to its table row
Form Element: simplify 'show_depend': only use css to hide
Form Element: Move code for 'show_depend' in is_shown()