Editing the real-time program

Operating elements for editing the real-time program.

1. Creating POUs and adding POUs from file
2. Changing the order of local variables
3. Renaming the local variables
4. Changing the section
5. Changing the data type
6. Changing the initial value
7. Filtering local variables
8. Creating/duplicating/deleting local variables
9. Filtering functions and function blocks
10. Adding a variable to the worksheet
11. Connecting POUs and variables
12. Choosing function blocks
13. Programming the real-time application in the worksheet