Fix getKeyValues() method footprint mismatches in soc.logic.models.site.Logic after the recent refactoring. Remove 'Link scope' drop-down from Edit Site Settings form. Patch by: Todd Larsen

Add a page name for 'Edit Main Site Settings'

Refactor classes in soc/logic/models to make more use of inheritance. Add some missing classes, such as soc.logic.models.group.Logic, so that key name similarities between various Groups can be exploited via inheritance instead of repetition of code. Patch by: Todd Larsen