User Variable refactoring
Merge branch 'FormulaEditor' into UserVariablesBricks
Set variable brick now uses the right adapter
Removed no longer used method
Fixed bug where you can't select variables
Merge branch 'FormulaEditor' into UserVariablesBricks
Initial commit of ChangeVariableBy brick
Begin VariableBrick Tests
Merge branch 'UserVariablesBricks' into FormulaEditor