Don't allow to set 'Allow on Submit' for standard fields. Fixes frappe/erpnext#956
Merge pull request #831 from anandpdoshi/anand-september-9

Don't allow to set 'Allow on Submit' for standard fields. Fixes frappe/erpnext#956
[fix] File Manager
Merge pull request #834 from anandpdoshi/anand-september-10

[fix] File Manager
[minor] Add permission to System Manager to allow User deletion