show versions in about in desk, fixes frappe/erpnext#1656
updated about, fixes to dialog and customize form fixes frappe/erpnext#1639
remove as_dict for style_settings
fixes for read only, added simple calculator in Help menu, fixes frappe/erpnext#1010
minor fixes for todo deletion
Rename doc fixes frappe/erpnext#1692
removed print statement
On cancel, check if doc is linked with other docs