Make Sorin's prompt more friendly with solarized colours

modules/prompt/functions/prompt_sorin_setup

@@ -47,9 +47,9 @@ function prompt_sorin_setup {
   add-zsh-hook precmd prompt_sorin_precmd
 
   zstyle ':prezto:module:editor:info:completing' format '%B%F{red}...%f%b'
-  zstyle ':prezto:module:editor:info:keymap:primary' format ' %B%F{red}❯%F{yellow}❯%F{green}❯%f%b'
+  zstyle ':prezto:module:editor:info:keymap:primary' format " ${1-%B}%F{red}❯%F{yellow}❯%F{green}❯%f${1-%b}"
   zstyle ':prezto:module:editor:info:keymap:primary:overwrite' format ' %F{red}♺%f'
-  zstyle ':prezto:module:editor:info:keymap:alternate' format ' %B%F{green}❮%F{yellow}❮%F{red}❮%f%b'
+  zstyle ':prezto:module:editor:info:keymap:alternate' format " ${2-%B}%F{green}❮%F{yellow}❮%F{red}❮%f${2-%b}"
   zstyle ':prezto:module:git:info:action' format ':%%B%F{yellow}%s%f%%b'
   zstyle ':prezto:module:git:info:added' format ' %%B%F{green}✚%f%%b'
   zstyle ':prezto:module:git:info:ahead' format ' %%B%F{yellow}⬆%f%%b'