fix(module/shell): synchonous invocation was broken

For some (unknown) reason, redrawing while in the update loop breaks the
update (this probably warrants a closer look).

As a quickfix to restore functionality, remove the unnecessary redraw
call and move it into the async codepath, where it is actually needed.

fixes #1001

bumblebee_status/modules/contrib/shell.py

@@ -53,6 +53,7 @@ class Module(core.module.Module):
 
     def set_output(self, value):
         self.__output = value
+        core.event.trigger("update", [self.id], redraw_only=True)
 
     @core.decorators.scrollable
     def get_output(self, _):
@@ -62,7 +63,6 @@ class Module(core.module.Module):
         # if requested then run not async version and just execute command in this thread
         if not self.__async:
             self.__output = util.cli.execute(self.__command, shell=True, ignore_errors=True).strip()
-            core.event.trigger("update", [self.id], redraw_only=True)
             return
 
         # if previous thread didn't end yet then don't do anything