Currently, it is possible to arrive in a state where the Properties of a DataStructure are displayed, even when in a Function Tab that is not the Data Tab.

When selecting a different Page from the Assets Panel, with the DataStructure Property still open, it can result in the Data Properties Dropdown Menus losing their functionality.

Repro Steps:

1) Create a new Studio Project featuring a 'MainPage.xaml', a 'Page2.xaml', and a 'Page3.xaml'.

2) Navigate to the Data Panel, and create a new Data Structure.

3) Within the Data Structure created in Step 2), create 3 new Data Properties of Types 'String', 'Boolean', and 'Number'.
Observe the Type Selector dropdowns functioning as expected.

4) With the Data Structure's Properties still open, navigate to the Assets Panel, and select any Page in the list which is not the currently-opened one.
Observe how the Type Selector Dropdowns in the DataPanel have had their Type removed, and have become greyed out.

5) Click on any of the Data Structure Properties 'Type' Dropdowns.
Observe how each 'Type' Dropdown features an empty menu.

Expected Results: When on another Function Tab, and the Data Properties are still open, they are still able to be edited as if on the Data Tab.