Fix for user profile edit view

A fix for the user profile edit view, to fix save profile, fixes
redirect
to users/admin (when displayed in front-end), and to allow form
customization.
Fixes for Variables Module

Fixes all data types to accommodate the usage of Field Data Type in the
Variables Module. Also includes fixes for the Image Data Type regarding
showing Thumb and Large files. Some css fixes for Image Data Type and
Variables Module show selectable drop-down.
Bug: FieldTypeManager does not load all field types

This to fix a problem with the FieldTypeManager not preloading the last
FieldType inside ‘Core’ and ‘Add_on’ folders
Merge branch '2.3/develop' of https://github.com/websemantics/pyrocms into 2.3/develop

Conflicts:
	system/cms/modules/streams_core/field_types/keywords/src/Pyro/FieldType/Keywords.php
	system/cms/modules/streams_core/src/Pyro/Module/Streams/FieldType/FieldTypeAbstract.php