Add RepRapPro style file opened to virtual printer

docs/configuration/config_yaml.rst

@@ -290,6 +290,14 @@ The following settings are only relevant to you if you want to do OctoPrint deve
        #        < ok T0:34.3/0.0 T1:23.5/0.0 B:43.2/0.0
        includeCurrentToolInTemps: true
 
+       # Whether to include the selected filename in the M23 File opened response.
+       #
+       # True:  > M23 filename.gcode
+       #        < File opened: filename.gcode  Size: 27
+       # False: > M23 filename.gcode
+       #        > File opened
+       includeFilenameInOpened: true
+
        # The maximum movement speeds of the simulated printer's axes, in mm/s
        movementSpeed:
          x: 6000

src/octoprint/plugins/virtual_printer/virtual.py

@@ -539,7 +539,10 @@ class VirtualPrinter(object):
 		else:
 			self._selectedSdFile = file
 			self._selectedSdFileSize = os.stat(file).st_size
-			self._send("File opened: %s  Size: %d" % (filename, self._selectedSdFileSize))
+			if settings().getBoolean(["devel", "virtualPrinter", "includeFilenameInOpened"]):
+				self._send("File opened: %s  Size: %d" % (filename, self._selectedSdFileSize))
+			else:
+				self._send("File opened")
 			self._send("File selected")
 
 	def _startSdPrint(self):

src/octoprint/settings.py

@@ -300,6 +300,7 @@ default_settings = {
 			"okWithLinenumber": False,
 			"numExtruders": 1,
 			"includeCurrentToolInTemps": True,
+			"includeFilenameOnOpened": True,
 			"movementSpeed": {
 				"x": 6000,
 				"y": 6000,