Make transparency of folders configurable

[FliegendeWurst]

What is it?

• Feature

Description of the changes in your PR

This PR makes the transparency of folders configurable. In my opinion the default is too opaque.

Before/After Screenshots/Screen Record

• Before (left): standard 10% transparency
• After (right): 90% transparency

Alternatives

Make the default >70% transparency and do not add a configuration option.

Acknowledgement

• I read the contribution guidelines.

[Aga-C]

Thanks for contributing, but next time please create an issue or discussion first (as stated in the contribution guidelines).

[naveensingh]

I found a couple issues:

• The whole preference option is not clickable and there is no ripple feedback.
• The change isn't applied immediately. I have to restart the app for changes to take effect.
• The preference should be located under the 'Home Screen' section. We don't have folders anywhere else.
• The current name 'Transparency of folder background' is a bit wordy and works differently compared to other launcher apps. Let's rename it to 'Folder background opacity' where 0% means fully transparent and 100% means fully opaque.

[fossifybot]

This pull request has been automatically closed due to inactivity. We requested additional information but have not received a response from the original author. Without the requested details, we cannot proceed. If you have the needed information or updates, please reopen the PR or comment so we can continue the review.

[FliegendeWurst]

Okay with me. I have since switched to a darker background where the current opacity looks good enough.

I'll leave my branch up, in case someone else wants this feature and addresses the feedback above.