Enable shortcut editor experiment by default
Enable shortcut editor experiment by default

* Also moved it out of `unstable` experiments

Fixed: 1335274,174309
Change-Id: I5a8157ed8aa04efc2b5a9776fac5d04f00f944d5
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/3841473
Reviewed-by: Changhao Han <68542faf32f0a558a873c0f094ca9bedb2744bff@chromium.org>
Commit-Queue: Changhao Han <68542faf32f0a558a873c0f094ca9bedb2744bff@chromium.org>
Auto-Submit: Ergün Erdoğmuş <83732cefebc70768faf466c30445921d3e357a21@chromium.org>

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