[completion] Prefer left-matching before fuzzy

all still being case insensitive.

Having just fuzzy matching returns too many matches in the average case.

modules/completion/init.zsh

@@ -56,7 +56,8 @@ zstyle ':completion:*:warnings' format '%F{red}-- no matches found --%f'
 zstyle ':completion:*' format '%F{yellow}-- %d --%f'
 zstyle ':completion:*' group-name ''
 zstyle ':completion:*' verbose yes
-zstyle ':completion:*' matcher-list 'r:|?=** m:{a-zA-Z}={A-Za-z}'
+local case_insensitive='m:{a-zA-Z}={A-Za-z}'
+zstyle ':completion:*' matcher-list ${case_insensitive} "${case_insensitive} r:|?=**"
 
 # directories
 zstyle ':completion:*:default' list-colors ${(s.:.)LS_COLORS}