added convenience methods to select attribute controller to retrieve instance settings
Merge branch 'select-controller-settings-methods' of github.com:aghouseh/concrete5 into merge_append_1180_select_attribute
Change Private Properties to Protected

Change private properties to protected for overrides and new public
methods
Merge pull request #1188 from mkly/merge_append_1180_select_attribute

Merge append 1180 select attribute