Improve reliability of tab creation

We now make sure that Terminal is active before using the tab creation shortcut. However there is still an issue if the user hasn't released the modifier keys used to initiate the command.

Author: infininight

Commands/Open directory in Terminal.plist

@@ -30,13 +30,16 @@ end
 
 def terminal_script_new_tab(dir)
   return <<-APPLESCRIPT
-    tell application "Terminal" to activate
-    tell application "System Events"
-      tell process "Terminal" to keystroke "t" using command down
-    end tell
-    tell application "Terminal"
-      do script "cd #{e_as(e_sh(dir))}; clear; pwd" in the last tab of window 1
-    end tell
+  tell application "Terminal"
+  	activate
+  	tell application "System Events"
+  		repeat while "Terminal" is not name of (process 1 where frontmost is true)
+  			delay 0.1
+  		end repeat
+  		tell process "Terminal" to keystroke "t" using command down
+  	end tell
+  	do script "cd #{e_as(e_sh(dir))}; clear; pwd" in the last tab of window 1
+  end tell
 APPLESCRIPT
 end