[Webkit-unassigned] [Bug 177676] New: Web Inspector: Styles: Undo reverts all changes at once

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=177676

            Bug ID: 177676
           Summary: Web Inspector: Styles: Undo reverts all changes at
                    once
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Inspector
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: nvasilyev at apple.com
                CC: inspector-bugzilla-changes at group.apple.com,
                    webkit-bug-importer at group.apple.com

Created attachment 322219

  --> https://bugs.webkit.org/attachment.cgi?id=322219&action=review

[Animated GIF] Bug

Steps:
1. Inspect any element with 2+ CSS properties.
2. Modify both property values one after another.
3. Move focus away from CSS editing field (CodeMirror).
4. Press Command-Z.

Expected:
Only the last change is reverted.

Actual:
All changes are reverted.

Notes:
I reproduced it in the shipped Safari and ToT WebKit.

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