When I'm in the middle of editing an element in the campaign's editor, and I'm ready to close the editing pane, I am constantly clicking the arrow at the top of the editing window which takes me back to the campaign overview screen.

The button to "save" the current changes is all the way at the bottom of the editing pane. Please move, or at least replicate the "Save" button at the top of the editing pane to make it easier NOT to click the arrow in the toolbar.