Bug: Changed data will be lost when page is switched in properties window

### Description

If you changed properties in a certain tab, that changes will be lost after you switched tabs.

### Steps To Reproduce

1. Go to folder properties window
2. Go to Customization tab
3. Change icon without tapping Save button
4. Go to General tab
5. Go back to Customization tab

Your icon selected is no longer selected.

### Requirements

I think it'd be better to instance all ViewModels of properties tab and put them into a list and use them every time frame content is changed instead of instancing new one.

### Files Version

3.0.0

### Windows Version

10.0.22000

### Log File

No logs because it's not unexpected behavior but implemented behavior.

Start by reproducing the folder properties window flow through the Customization and General tabs, then inspect how each tab's ViewModel is created when the frame content changes. The issue is done when an unsaved icon selection remains selected after switching away from and back to the Customization tab.

Written by the indexing model from the issue text.