Fix tasklist checkboxes on rtl languages

What does this MR do?

solve problem of checkboxes position:absolute to let checkboxes be in correct place

Are there points in the code the reviewer needs to double check?

No

Why was this MR needed?

they are positioned at left on rtl languages

Screenshots (if relevant)

see the issues and below comments

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• [n/a] Documentation created/updated
• [n/a] API support added
• [n/a] Tests added for this feature/bug
• Review
  • Has been reviewed by UX
  • Has been reviewed by Frontend
  • [n/a] Has been reviewed by Backend
  • [n/a] Has been reviewed by Database
• Conform by the merge request performance guides
• Conform by the style guides
• Squashed related commits together
• Internationalization required/considered

What are the relevant issue numbers?

#42109 (moved)