Closes #867

Summary

This PR fixes tweak visibility/filtering so "Show tweaks" and related list filtering use the same detection logic.

Changes

• add a single IsScriptTweak property to ApplicationUninstallerEntry
• use that property in the main list filtering logic
• use that property for the "View tweaks" command
• use that property when checking whether any tweaks are present
• add a regression test for tweak ID detection

Why

Tweak entries currently use RatingId = "Tweak-...", but different parts of the UI were using inconsistent detection logic:

• one place checked tweak IDs case-insensitively
• another checked them case-sensitively
• another still relied on an old uninstall-string path pattern

Because of that, tweaks could stay visible even when "Show tweaks" was disabled.

Result

Tweaks are now detected consistently across:

• sidebar visibility
• basic filtering
• "View tweaks"
• equivalent filter generation