Add setting fetch_new_remotes: true

When adding remotes, we always asked if we should now also fetch this
remote.  Add "fetch_new_remotes" and just fetch without asking if set
to `True`.

This is also the default because frankly you likely want that.  (Except
for huge repos, but then set this in the project settings, no?)

Author: kaste

GitSavvy.sublime-settings

@@ -290,6 +290,11 @@
      */
     "confirm_force_push": true,
 
+    /*
+        When set to `true`, GitSavvy will fetch newly added remotes automatically.
+     */
+    "fetch_new_remotes": true,
+
     /*
         When set to `true`, closing the commit message window via keyboard will result
         in a commit action being taken, except in cases where the message is empty.

core/commands/remote.py

@@ -43,7 +43,7 @@ def on_enter_name(self, remote_name):
             run_on_new_thread(self.git, "config", "--local", "gitsavvy.pushdefault", remote_name)
             self.update_store({"last_remote_used_for_push": remote_name})
 
-        if sublime.ok_cancel_dialog(
+        if self.savvy_settings.get("fetch_new_remotes", True) or sublime.ok_cancel_dialog(
             "Your remote was added successfully.  "
             "Would you like to fetch from this remote?"
         ):