Consistent action for publish [post] and [comment]

[zcyzcy88]

New post

• Enter key to break line
• Click button to submit (no shortcut key)

New comment

• Shift + Enter key to break line
• Enter to submit (no button)

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I expect a consistent action to:

• Enter key to break line
• Click button to submit
• Ctrl + Enter to submit (this is the shortcut key)