Docs update Tool Specification Editor -section

Added info about the ability to manage Tool arguments in the Properties dock widget.

Re #2156

docs/source/tool_specification_editor.rst

@@ -46,6 +46,10 @@ which accepts command line arguments `a` and `b`.
 Writing `a b` on the command line arguments field in the tool specification editor is the equivalent
 of running the batch file in command prompt with the command ``do_things.bat a b``.
 
+.. tip:: Another way to pass arguments to a Tool is to write them into the *Tool arguments*
+   drop-down list in the **Properties** dock widget. There it is possible to also rearrange existing
+   arguments or to select available resources that are provided by other project items as arguments.
+
 *Additional source files* is a list of files that the main program requires in order to run. You can add
 individual files the same way as with the main program file or whole directories at once by pressing the
 |folder_open_solid| button.