Better structure saver screen

[MelanX]

Describe your idea

Situation

As of now, there are multiple types of templates.

• Island templates - the island where a player spawns
• Spread templates - the islands spread around the island template
• Nether templates - the template used as nether portal while writing this, it's not public

Current design

It would be better to have separate screens for each template type. This could be achieved by adding a screen with tabs like the creative tabs screen. The default would be the island template tab.

Content for each tab

General

• save to config
• export type button (snbt or nbt)
• ignore air
• validate
  • checks for spawn blocks on island template
  • checks for nether portal on nether template

Island template

• is spawn setting -> will set the spawn island config instead of adding a new template to the list
• blocks from inventory as surrounding blocks -> if checked, there could be an input field for the margin

Anything else?

It would be good if these tabs would be auto-selected when restoring the structure saver config, as well as the selected config options.

[MelanX]

Make an item which behaves like Structure Void but will be replaced with air.
Alternatively, a checkbox for replacing Structure Voids with air.