Fix RTL text rendering for display names (#4747)
* header display name rtl support
* highlighted post rtl
* move `NON_BREAKING_SPACE` to an external constant
* rtl support in search dropdown
* profile card rtl
* old profile card rtl
* hover card
* wizard list card
* new chat
* account card
* chat header
* clean up notifications
* just force LTR on meta display name