[Possible] Remove main interface altogether

[shyamamrith]

The main interface is proving problematic, with scaling on various screen resolutions and rendering on computers with foreign font packages. It may be an idea to do away with this interface altogether, and instead have launch options directly from the toolbar.

Ideas:

• A toolbar button for Add Fields. This could open a small dialog to select a layer.
• A toolbar button to launch the whole Simstock process (after add fields). For each step below, a pop-up could be shown:
  • Config settings are displayed (and editable)
  • CWD location is asked
  • Layer selection