Add warning to InputMap.load_from_project_settings() about running …

…it in a tool script

doc/classes/InputMap.xml

@@ -107,6 +107,7 @@
 			<return type="void" />
 			<description>
 				Clears all [InputEventAction] in the [InputMap] and load it anew from [ProjectSettings].
+				[b]Warning:[/b] Calling this method inside a tool script will cause certain editor-specific inputs to not work.
 			</description>
 		</method>
 	</methods>