Dispose Homepage on navigation

[d2dyno1]

Resolved / Related Issues

• For Feature: Improving Performance, optimizations, reliability and codebase  #4180

Details of Changes
YourHome.Dispose() is now called on navigation. It is possible to modify the code for any page to be disposed on navigation however that's not the case here. The problem with disposing every page but YourHome is that any other page is being reused and in YourHome's case, the widgets are created on navigation.
This PR fixes the issue where widgets weren't being disposed on navigaion and in Bundles case, it fixes a memory leak.

Validation
How did you test these changes?

• Built and ran the app
• Tested the changes for accessibility

[lukeblevins]

This is a bit overkill, considering we can just call Dispose() in YourHome's OnNavigatingFrom override. The code looks good, but I'm not sure if we need the FrameExtensions at all unless there's another reason for it.

[d2dyno1]

@duke7553 we could call a function similar to ICleanup.Clanup() on other views.

[yair100]

@duke7553 Should we merge this?

[d2dyno1]

@yaichenbaum could you review this one? It's fixing a memory leak 👀

[cinqmilleans]

@yaichenbaum @d2dyno1 "using File.Extensions" is unused and useless in 2 files. "WidgetPage.xaml.cs" is better.

[lukeblevins]

Clever enough solution to call the Dispose() method, so I suppose