I have added a "Reload File" action to the scripter plugin. This allows you to reload the currently active file when it has been edited outside the scripter interface.

Reasoning:
I was preparing a python script. I realised that I may want to use a text editor e.g. Kate to edit my py script externally or a python IDE. I then noticed that Scripter does not detect any file changes. Currently to reload file contents I had to either close and open the file using Scripter or exit the Scripter window and relaunch it from Tools->Scripts->Scripter.

Both of these methods are slow. So I added a "Reload File" feature so a user can just press Alt+R or use the menu entry to load the external changes back into Scripter.

case 1: When a document is open:

1. Create a py file in scripter and save it
2. Open the same py file in an external text editor
3. Make changes in the external editor and save it
4. Press Alt + R or use the "Reload File" menu item.

Expected result: The text in the editor in the Scripter's ui should be updated with the changes made externally

case2: when there is no active document (E.g. when you use the "New" action of Scripter):

1. Press Alt + R or use the "Reload File" menu item.

Expected result: A messagebox with an error sign informing the user to open a file first should appear