Pages information does not seem to update on the Rightsidebar when changing select frameworks

[prupipho]

Describe the bug
If you have different information for the pages on the templates, it doesn´t seem to update properly the information shown on the Rightsidebar. It does correctly on the main area of Step 3: Add Pages. Information you can change is name of the page, icon,...

To Reproduce

1. Update the page information on the templates to have different values. For example, remove icon.svg from ...\templates\Web\Pages\Angular.Blank\.template.config and change the name for instance in template.json.
2. Open Web Template Studio (Ctrl + Shift + P: Web Template Studio)
3. When changing the framework selection you should see the rightsidebar consistent with the content displayed on Step 3: Add Pages
4. In the main area you can see your updated name and missing icon AngularBlank but in the rightsidebar still shows Blank and the default image for React

Expected behavior
Rightsidebar shows correct information about pages from the template configuration.

Screenshots

• WebTS Version: 0.4

It wasn´t noticed before, because so far the name of the pages are the same. Now that we included the option to display a default icon in case that the template missed that information, we realised that the rightsidebar does not seem to update correctly. #1376