Add "_UNTRACKED" option for _VCS to change colors - default yellow

powerlevel9k.zsh-theme

@@ -730,6 +730,8 @@ prompt_vcs() {
   autoload -Uz vcs_info
 
   VCS_WORKDIR_DIRTY=false
+  VCS_WORKDIR_HALF_DIRTY=false
+
   VCS_CHANGESET_PREFIX=''
   if [[ "$POWERLEVEL9K_SHOW_CHANGESET" == true ]]; then
     # Default: Just display the first 12 characters of our changeset-ID.
@@ -774,11 +776,15 @@ prompt_vcs() {
     if [[ "$VCS_WORKDIR_DIRTY" == true ]]; then
       # $vcs_visual_identifier gets set in +vi-vcs-detect-changes in functions/vcs.zsh,
       # as we have there access to vcs_info internal hooks.
-      "$1_prompt_segment" "$0_MODIFIED" "$2" "yellow" "$DEFAULT_COLOR" "$vcs_prompt" "$vcs_visual_identifier"
+      "$1_prompt_segment" "$0_MODIFIED" "$2" "red" "$DEFAULT_COLOR" "$vcs_prompt" "$vcs_visual_identifier"
+    else
+      if [[ "$VCS_WORKDIR_HALF_DIRTY" == true ]]; then
+        "$1_prompt_segment" "$0_UNTRACKED" "$2" "yellow" "$DEFAULT_COLOR" "$vcs_prompt" "$vcs_visual_identifier"
       else
         "$1_prompt_segment" "$0" "$2" "green" "$DEFAULT_COLOR" "$vcs_prompt" "$vcs_visual_identifier"
       fi
     fi
+  fi
 }
 
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