--reload should only trigger for -i databases

[simonw]

Right now it's triggering any time a mutable database changes.

[simonw]

Just saw this bug again. It's annoying.

Here's the code that causes it:

datasette/datasette/cli.py

Lines 327 to 333 in d6b6c91

	if reload:
	import hupper
	reloader = hupper.start_reloader("datasette.cli.serve")
	reloader.watch_files(files)
	if metadata:
	reloader.watch_files([metadata.name])

files here is the list of mutable databases. immutable is the list of immutable ones.