jScope Split "Erase" button into "Clear" and "Remove"

[WhoBrokeTheBuild]

When editing an expression for a panel in jScope, there is a button labeled "Erase". When clicked, it erases all data for the panel.

I propose splitting this into two buttons:

• "Clear" which will retain the current functionality
• "Remove" which will remove the currently selected expression (This can currently only be done by clicking on the expression and pressing Delete on your keyboard)