Rename `apply_background_subtraction()` to be more specific

[ehrenfeu]

Rename apply_background_subtraction() to rollingball_background_subtraction or apply_rollingball_bg_subtraction to be more informative.

Originally posted by @lguerard in #49 (comment)

python-imcflibs/src/imcflibs/imagej/processing.py

Lines 69 to 95 in f0a1c9c

	def apply_background_subtraction(imp, rolling_ball_radius, do_3d=False):
	"""Perform background subtraction using a rolling ball method.
	Parameters
	----------
	imp : ij.ImagePlus
	Input ImagePlus to filter and threshold
	rolling_ball_radius : int
	Radius of the rolling ball filter to use
	do_3d : bool, optional
	If set to True, will do a 3D filtering, by default False
	Returns
	-------
	ij.ImagePlus
	Filtered ImagePlus
	"""
	log.info("Applying rolling ball with radius %d" % rolling_ball_radius)
	options = "rolling=" + str(rolling_ball_radius) + " stack" if do_3d else ""
	log.debug("Background subtraction options: %s" % options)
	imageplus = imp.duplicate()
	IJ.run(imageplus, "Substract Background...", options)
	return imageplus