When editing a text field in chromium deleting the surrounding text with
backspace fails with `The selection range for surrounding text is invalid`
It seems like `(start - keyboard->surrounding_text) - keyboard->surrounding_cursor` evaluates to -1.
As far as i can tell `start - keyboard->surrounding_text` evaluates to
the index in the surrounding_text char arrays that should be deleted.
Signed-off-by: Aske Bækdal Møller <aske@geanix.com>
(cherry picked from commit 33ec3898d0ae71a640aea9164f61311d6c32c753)
7e1115479b