Fix macvim-askpass to send event to MacVim itself instead of Finder

This fixes the focus issues with it and also makes the permission dialog
box a little less sketchy (previously it would appear MacVim is trying
to control Finder).

See #1091 for code contribution.

Close #1091.

Author: ychin

src/MacVim/macvim-askpass

@@ -18,8 +18,7 @@ TITLE=${MACOS_ASKPASS_TITLE:-"SSH"}
 DIALOG="display dialog \"$@\" default answer \"\" with title \"$TITLE\""
 DIALOG="$DIALOG with icon caution with hidden answer"
 
-result=`osascript -e 'tell application "Finder"' -e "activate"  -e "$DIALOG" -e "text returned of result" -e 'end tell'`
-osascript -e 'tell application "MacVim"' -e "activate" -e 'end tell'
+result=`osascript -e 'tell application "MacVim"' -e "activate"  -e "$DIALOG" -e "text returned of result" -e 'end tell'`
 
 if [ "$result" = "" ]; then
     exit 1