Fix fish PATH configuration

PATH is handled separately in fish. Universal export does not work
properly.

See https://github.com/fish-shell/fish-shell/issues/527 for more
information.

Install/Templates/fish/config.fish

@@ -1 +1,2 @@
 # Fish configuration file
+set --export --global PATH ~/.bin ~/.local/bin /usr/local/sbin /usr/local/bin /usr/sbin /usr/bin /sbin /bin /usr/games /usr/local/games /snap/bin

Install/basic-custom

@@ -14,4 +14,3 @@ set --export --universal JHE 'jovian-hersemeule.eu'
 set --export --universal EDITOR 'vi -e'
 set --export --universal VISUAL vim
 set --export --universal TERMINAL alacritty
-set --export --universal PATH ~/.bin ~/.local/bin /usr/local/sbin /usr/local/bin /usr/sbin /usr/bin /sbin /bin /usr/games /usr/local/games /snap/bin