Rule module popup: add dirty checking

[jimtng]

This PR adds dirty checking in the rule module popup.

Rule module popup comes up when you're editing a rule's module, e.g. trigger, action, condition. Previously when you opened the rule module and made changes, then clicked back, you wouldn't get a warning and the changes will simply be lost.

[relativeci]

Job #1714: Bundle Size — 11.02MiB (~+0.01%).

da28c6f(current) vs cc62a8f main#1713(baseline)

Warning

Bundle contains 19 duplicate packages – View duplicate packages

Bundle metrics   1 change

	Current Job #1714	Baseline Job #1713
Initial JS	1.85MiB	1.85MiB
Initial CSS	607.92KiB	607.92KiB
Cache Invalidation	18.25%	17%
Chunks	220	220
Assets	242	242
Modules	3089	3089
Duplicate Modules	164	164
Duplicate Code	1.77%	1.77%
Packages	150	150
Duplicate Packages	18	18

Bundle size by type   1 change 1 regression

	Current Job #1714	Baseline Job #1713
JS	9.21MiB (~+0.01%)	9.2MiB
CSS	889.4KiB	889.4KiB
Fonts	526.1KiB	526.1KiB
Media	295.6KiB	295.6KiB
IMG	140.74KiB	140.74KiB
HTML	1.24KiB	1.24KiB
Other	871B	871B

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[stefan-hoehn]

Would you mind adding some description of what the intent of the change is?

[jimtng]

Updated description

[florian-h05]

LGTM, thanks! Much needed improvement.