Enhanced multicursor，The delete and backspace actions do not conform to the editor's requirements.

[zundaren]

bug

Hope to add Shift + Alt + mouse drag for Enhanced multicursor functionality

[heckmon]

I'll fix it in the next release. And, Shift + Alt + mouse drag may be difficult because the selection uses the TextSelection class, which only supports two endpoints: baseOffset (selection start) and extentOffset (selection end).