Is your feature request related to a problem? Please describe.

I would like a way to add, edit, or remove a section mapping, using the GUI.

Describe the solution you'd like

Adding section:

1. right click in the section list in the GUI and click add.
2. pop up window with editable fields for fd, vaddr, size, paddr, flags and name.
3. either click a cancel or add button.
4. done.

Edit section:

1. right click on a section entry click edit.
2. pop up window with editable fields for fd, vaddr, size, paddr, flags and name filled accordingly.
3. either click cancel or apply changes.
4. done.

Deleting section:

1. right click on a section entry click delete.
2. optionally ask confirmation.
3. section mapping is removed.

Describe alternatives you've considered
Continue to use the om console commands.