fix(avit): RPROMPT Fix for #10307 (#11131)

Co-authored-by: Steve Lessard <slessardjr@users.noreply.github.com>

themes/avit.zsh-theme

@@ -11,7 +11,12 @@ $(_user_host)${_current_dir} $(git_prompt_info) $(ruby_prompt_info)
 
 PROMPT2='%{%(!.${fg[red]}.${fg[white]})%}◀%{$reset_color%} '
 
-RPROMPT='$(vi_mode_prompt_info)%{$(echotc UP 1)%}$(_git_time_since_commit) $(git_prompt_status) ${_return_status}%{$(echotc DO 1)%}'
+__RPROMPT='$(vi_mode_prompt_info)%{$(echotc UP 1)%}$(_git_time_since_commit) $(git_prompt_status) ${_return_status}%{$(echotc DO 1)%}'
+if [[ -z $RPROMPT ]]; then
+  RPROMPT=$__RPROMPT
+else
+  RPROMPT="${RPROMPT} ${__RPROMPT}"  
+fi
 
 function _user_host() {
   local me