zsh: Reverse alias expansion between space and ctrl space

Previously, <space> would expand any alias and all environment
variables while <c-space> would simply put a normal space on the zle
without performing any expansion.

This change reverses this, so that nothing gets expanded by default
_but_ if the user wants to specifically expand something the option
exists to simply use <c-space> to see the expanded version.

terminal/.config/zsh/zshrc

@@ -171,16 +171,17 @@ alias history="fc -l -d -D"
 ### Glob Alias expansion
 # Expand aliases inline - see http://blog.patshead.com/2012/11/automatically-expaning-zsh-global-aliases---simplified.html
 globalias() {
-    if [[ $LBUFFER =~ [A-Z0-9]+$ ]]; then
-        zle _expand_alias
-        zle expand-word
-    fi
-    zle self-insert
+    zle _expand_alias
+    zle expand-word
+    zle magic-space
 }
 zle -N globalias
-bindkey " " globalias
-bindkey "^ " magic-space           # control-space to bypass completion
-bindkey -M isearch " " magic-space # normal space during searches
+bindkey -M emacs "^ " globalias # expand anything when hitting <c-space>
+bindkey -M viins "^ " globalias # only expand when in insert mode for vi
+bindkey -M emacs " " self-insert
+bindkey -M viins " " self-insert
+bindkey -M vicmd " " self-insert         # space puts a space, even in cmd mode
+bindkey -M isearch " " self-insert # normal space during searches
 
 # allow inserting previous arguments in the current zle input
 # see https://stackoverflow.com/a/34861762
@@ -234,8 +235,6 @@ bindkey -M vicmd 'C' _run-cdi
 # insert-mode keybind is above, using regular fzf sourcing
 bindkey -M vicmd 'T' fzf-file-widget
 
-# space puts a space, even in cmd mode
-bindkey -a ' ' magic-space
 # always allow backspace/delete to remove letters
 bindkey '^?' backward-delete-char
 bindkey -a '^?' backward-delete-char