fix #3267, CORRECTLY, add testcase, add testcase for #3279 (#3681)

fixes #3267 AGAIN, correctly, add testcase
add testcase for #3679 , broadcast clipping incorrectly

I added a test module (tests/testNotification) to catch the notification
and check the count. (one way to configure)
i put this module in the tests folder, and added /tests to the server
paths.
(can't have a module in a nested folder, like tests/modules/xxx)

but I have a problem. i can run the test config (MM_CONFIG_FILE), and
the two modules work correctly,
but in the spec runner, the calendar module times out on the broadcast
test.. there is only local ics file access, no outside hosts

I forced my system date to 1/1/24 (same as runner) and again the manual
testcase works fine

I added two test config.js,(configs/calendar) one works great (symbols)
, one fails (broadcast test)
I added additional delay in the calendarspec runner to try to debug the
module, but it still not long enough.. no messages of trouble when I get
into the browser.. BUT, this may be because of the log being turned
off... (just thought of this)

I created a special ICS (in mocks) that has 12 events, 1 for each
month.. (so I can check clipping and broadcast) the US holidays one is
sensitive to the current date, and I couldn't get it to work on
1/1/2024..

also, in general, is there a mechanism to run test:just_one_runner?
waiting thru the electron test to get to one testcase.. ugh..

js/app.js

@@ -177,7 +177,7 @@ function App () {
 				moduleFolder = defaultModuleFolder;
 			} else {
 				// running in Jest, allow defaultModules placed under moduleDir for testing
-				if (env.modulesDir === "modules") {
+				if (env.modulesDir === "modules" || env.modulesDir === "tests/mocks") {
 					moduleFolder = defaultModuleFolder;
 				}
 			}