Adds sudo writes to nvim

If in nvim and the SUDO_ASKPASS environment variable is set then a WW
mapping will expand to

:w !sudo -A tee % >/dev/null

If in not-neo vim, the -A is omitted.

The environment variable is also set. Some unused environment variables
were also removed.

https://stackoverflow.com/questions/2600783/how-does-the-vim-write-with-sudo-trick-work
https://github.com/neovim/neovim/issues/12103

nvim/.config/nvim/plugin/mappings.vim

@@ -81,3 +81,11 @@ nnoremap ]c :cnext<cr>
 
 " Run proselint and put it in the quickfix list
 nnoremap <leader>p :call mine#functions#proselint()<CR>
+
+if has('nvim')
+	if !empty($SUDO_ASKPASS)
+		cnoremap WW w !sudo -A tee % > /dev/null
+	endif
+else
+	cnoremap WW w !sudo tee % > /dev/null
+endif

shells/shared/environmentVariables

@@ -52,16 +52,7 @@ export MSSQL_CLI_TELEMETRY_OPTOUT=1
 export DOTNET_CLI_TELEMETRY_OPTOUT=1
 export POWERSHELL_CLI_TELEMETRY_OPTOUT=1
 
-#export GTK_THEME=Adapta-Nokto
+# Askpass
+# I will use this for sudo writes in nvim
+[ -f "/usr/lib/seahorse/ssh-askpass" ] && export SUDO_ASKPASS=/usr/lib/seahorse/ssh-askpass
 
-if [ -n "$GTK_MODULES" ]
-then
-  export GTK_MODULES="$GTK_MODULES:unity-gtk-module"
-else
-  export GTK_MODULES="unity-gtk-module"
-fi
-
-if [ -z "$UBUNTU_MENUPROXY" ]
-then
-  export UBUNTU_MENUPROXY=1
-fi