Spinner: wait for UI to start (#20279)

* Impose a max rate for updating spinner progress

* fix import

* Show spinner until offroad is started

* no need for time

* Fix ROOT_DIR

* Fix fb include

* fix relative path

* don't touch these files

* Close spinner after all procs have started

* don't touch file

* Move up

* Revert changes to spinner, and only sleep on final progress update

* add this back

* revert time

* test sending 100

* test sending 100

* revert makefile changes

* rm 2nd 100% update

* pass spinner to thread function

* pass ignore list

* Default to None

Co-authored-by: Willem Melching <willem.melching@gmail.com>

Co-authored-by: Willem Melching <willem.melching@gmail.com>
old-commit-hash: a3556410de

common/spinner.py

@@ -25,7 +25,7 @@ class Spinner():
         pass
 
   def update_progress(self, cur: int, total: int):
-    self.update(str(int(100 * cur / total)))
+    self.update(str(round(100 * cur / total)))
 
   def close(self):
     if self.spinner_proc is not None: