Refactor blur implementation throughout launcher elements

Description

Refactor blur implementation and decrease the scales and radius for UI elements like widgets, folders.

Commits will be squashed in the end while merge.

https://gitlab.e.foundation/e/backlog/-/issues/5550#note_241598

Issue(s)

https://gitlab.e.foundation/e/backlog/-/issues/5550, e/backlog#4000 (closed), https://gitlab.e.foundation/e/os/backlog/-/issues/783

Screenshots

Check list

• Self review
• Test procedure explained
• Tested on fresh install
• Tested applied as an update
• License
• Internal documentation
• User documentation