Minor tweaks to dunst, vim, zsh

Auto-init tab completion in ZSH
Normalize backspace handling in vim (for windows support)
Force dunst to place notifications on monitor 1, since I moved to
two-monitor setup.

.config/dunst/dunstrc

@@ -1,7 +1,8 @@
 [global]
     geometry = "600x20"
     shrink = no
-    follow = mouse
+    monitor = 1
+    follow = none
     indicate_hidden = yes
     transparency = 0
     frame_width = 2

.vimrc

@@ -1,6 +1,9 @@
 " Ensure certain plugins work by removing vi compatable modes
 set nocompatible
 
+" Make backspace work as expected on all platforms
+set backspace=indent,eol,start
+
 " Start Vundle, temporarily set some values
 set rtp+=~/.vim/bundle/Vundle.vim
 filetype off

.zshrc

@@ -62,6 +62,7 @@ SAVEHIST=10000
 setopt appendhistory
 
 # Case-insensetive tab completion
+autoload -Uz compinit && compinit
 zstyle ':completion:*' matcher-list 'm:{a-z}={A-Za-z}'
 
 # To customize prompt, run `p10k configure` or edit ~/.p10k.zsh.