I would like tab key support in schematica.

When tab key is pressed I think the following should happen:

1. if nothing is selected then select the first input box
2. if an non-empty input box is selected then select the next (first) input box and select all the contents in that box (like when you press ctrl+a in chat)
3. if an empty box is selected then input the corresponding coordinate of the block that the cursor is pointing to or the corresponding coordinate of the player if it is a coordinate input (similar to using tab while inputting coordinates in commands), otherwise select the next/first box

While some content is selected inputting an value should overwrite current value, and backspace/delete should delete the current value.

This will make inputting things easier and faster as you don't need to move and click the mouse in order to access a different input box.

I have circled the input boxes that I think the controls mentioned above should apply to in pictures below.

BTW structure blocks have part of the things that I've mentioned above, if that helps.