Make Cmd + A select the conversation text (not all conversations) when focused in the conversation pane

When I’m in the Inbox and the cursor is inside the conversation content area, pressing Cmd + A currently selects all conversations in the current view. It would be much more useful if Cmd + A selected the text inside the conversation instead (so I can copy the full chat). This matches the expected behavior in most text areas and improves keyboard navigation for copying conversations.