frontends (tools/aio): Fix excessive use of CPU:

Use a short delay instead of `loop.call_soonloop.call_soon` when work as been done, as
this was resulting in an excessive use of CPU.

libervia/frontends/tools/aio.py

@@ -141,8 +141,9 @@ def install_glib_asyncio_iteration():
         if iteration_count == 0:
             loop.call_later(0.01, _glib_iteration)
         else:
-            # Schedule ourselves to run again on the next asyncio loop iteration
-            loop.call_soon(_glib_iteration)
+            # Work has been done, and there may still be some. Use a shorter delay to
+            # schedule ourselves again.
+            loop.call_later(0.001, _glib_iteration)
 
     # Kick off the GLib iteration
     loop.call_soon(_glib_iteration)