Fix issue with text selection in text_input widget

[cmot17]

Broken behavior before this PR:

2021-10-23.14-57-31.mp4

Fixed behavior with this PR:

2021-10-24.09-01-40.mp4

Also I don't really know how to avoid the addition to .gitignore, hopefully that isn't an issue?

[thenlevy]

Regarding the .gitignore addition you can avoid it by doing the following

git reset --mixed HEAD^ (this "undo the commit" without changing the files)
cargo fmt
git add native/src/widget/text_input.rs
git commit -m "Fix issue with text selection in text_input widget" (notice that it's only -m and not -am)
git push --force your_github_repo this will replace the commit you submitted in this PR by an other one without the unnecessary editing to .gitingore and with proper formatting

[hecrj]

Thank you 🎉

I have rebased and deleted the .gitignore changes 👍