Add possibility to indent configs in setup.xml files

Add a possiblity to indent a config in the setup.xml file by adding an
indent attribute where you can put a string (most likelu spaces) to
indent a config. E.g. when you have a switch or a config that allows
more additional settings then it can indent so you can build a better
overview. The new attribute in setup.xml is just a simple string that
will be added in front of the config text.

lib/python/Screens/Setup.py

@@ -105,11 +105,12 @@ def addItems(self, parentNode, including=True):
 				including = True
 
 	def addItem(self, element):
+		indent = element.get("indent", "")
 		if self.pluginLanguageDomain:
-			itemText = dgettext(self.pluginLanguageDomain, x) if (x := element.get("text")) else "* fix me *"
+			itemText = indent + (dgettext(self.pluginLanguageDomain, x) if (x := element.get("text")) else "* fix me *")
 			itemDescription = dgettext(self.pluginLanguageDomain, x) if (x := element.get("description")) else ""
 		else:
-			itemText = _(x) if (x := element.get("text")) else "* fix me *"
+			itemText = indent + (_(x) if (x := element.get("text")) else "* fix me *")
 			itemDescription = _(x) if (x := element.get("description")) else ""
 		item = eval(element.text or "")
 		if item == "":