Keyboard shortcuts for quicker replying and editing

image The current message-related shortcuts only work when focused on a message via tabbing (?), but shift+tab to select a message seems tedious. A quick way to reply to an arbitrary message on screen or edit any of ones own messages would be nice. For example some client modifications for discord implement systems just like this.

E.g.: CTRL+UP to reply to the latest message. Hitting the shortcut again moves up to reply to the next message. Can be repeated arbitrarily to quickly reply to any message in the recent chat history without back-tabbing or using the mouse. SHIFT+UP to edit the latest [editable] message. Hitting the shortcut again moves up to edit the next editable message. Can also be repeated.