Paste does not support overtype mode

[mahiki]

Great extension, much needed!

I want paste operations to overwrite chars, currently in overtype mode the cmd-v (macos) operation is the same as insert mode, the existing chars are scooched back. Pasted strings should overwrite the succeeding characters.

Also delete should behave differently in overtype mode: replace the character with a whitespace (space) char, and not move the subsequent string on line at all.

So:

• Make paste operation observe overtype behavior
• Make backspace/delete operation observe overtype behavior

The general idea in overwrite/overtype is that the chars to the right of the cursor should not shift to the left or right.