globalias: expand filtering to anywhere in the command (#9338)

plugins/globalias/globalias.plugin.zsh

 globalias() {
-   if [[ $GLOBALIAS_FILTER_VALUES[(Ie)$LBUFFER] -eq 0 ]]; then
+   # Get last word to the left of the cursor
+   local word=${${(A)=LBUFFER}[-1]}
+   if [[ $GLOBALIAS_FILTER_VALUES[(Ie)$word] -eq 0 ]]; then
       zle _expand_alias
       zle expand-word
    fi