Thimble portion of fix for #896, also requires https://github.com/humphd/brackets/pull/440
Thimble portion of fix for #896, also requires https://github.com/humphd/brackets/pull/440

humphd/thimble.mozilla.org,humphd/thimble.mozilla.org,mozilla/thimble.mozilla.org,mozilla/thimble.mozilla.org,humphd/thimble.mozilla.org,humphd/thimble.mozilla.org,mozilla/thimble.mozilla.org,mozilla/thimble.mozilla.org