Redmine

Redmine currently uses an additional rtl.css file to override some LTR-oriented styles for RTL languages. However, this file only covers part of the UI, is not fully in sync with the current core stylesheets, and leads to layout issues in RTL.

As an intermediate step to improve RTL support, I would like to:

• Integrate the necessary overrides in rtl.css into application.css using logical properties (e.g. margin-inline, padding-inline, text-align: start/end), which automatically map to the appropriate left or right side depending on whether the layout is LTR or RTL. Logical properties are already used partially within application.css (examples: r24158, r24159, r24160, and r24161).
• Remove obsolete or redundant rules.
• Delete rtl.css once its content has been merged into application.css.

This change will not fix all RTL layout problems. However, by resolving the inconsistencies that have accumulated between rtl.css and application.css, it should noticeably improve RTL layouts. It will also remove the fragile separate RTL stylesheet and provide a cleaner base for further RTL improvements.