Enhance layout change handling

[Moyf]

Resolve #21

Hey! I tried to locate the issue, and found out that it's due to layout-change, so I add a new condition to decide whether refresh based on "if file change".

Now it works fine with my Hover Editor, could you check it when you have time?

[Signynt]

Sorry, accidentally merged this, reverted it back again.
I have some bugs when using this PR, specifically when opening new files and switching between reading and editing view. The virtual content then get's inserted in the wrong places (editing view), or not at all (reading view).

1. How it's supposed to look, and looks when I initially open the file (so in this case it works correctly:

2. When I then toggle to "Reading View":

3. When I then toggle back to "Editing View":

[Moyf]

Sorry, accidentally merged this, reverted it back again. I have some bugs when using this PR, specifically when opening new files and switching between reading and editing view. The virtual content then get's inserted in the wrong places (editing view), or not at all (reading view).

1. How it's supposed to look, and looks when I initially open the file (so in this case it works correctly:

2. When I then toggle to "Reading View": 3. When I then toggle back to "Editing View":

Ah, I see... it seems I need to also consider the view modes.
I'll continue digging into it, thank you for your test! 🫡