Script generator: Display the name of the loaded parameters file

[DominicOram]

As a muon scientist I would like the name of the currently loaded parameters file to be displayed on the script generator screen. This will make it easier to see what experiment I'm currently doing. If I modify the values in the script generator I would like the name to reflect this, either by disappearing or some other indication.

##Acceptance Criteria

• When I load parameters into the script generator the name of the file is displayed somewhere on the screen
• There is in an indication when the parameters are modified to be different than those in the original file

[DominicOram]

Duplicate of #5970 and #5969 so closing this one