Improve help text for new keyboard shortcuts

thrimbletrimmer/beta/edit.html

@@ -55,15 +55,12 @@
 					<li>Equals (=): Increase playback speed one step</li>
 					<li>Hyphen (-): Decrease playback speed one step</li>
 					<li>
-						Left bracket ([): Set start point for current range (indicated by arrow) to current
+						Left bracket ([): Set start point for active range (indicated by arrow) to active
 						video time
 					</li>
-					<li>Right bracket (]): Send end point for current range to current video time</li>
+					<li>Right bracket (]): Set end point for active range to active video time</li>
-					<li>O: Switch the current range up one</li>
+					<li>O: Set active range one above current active range</li>
-					<li>
+					<li>P: Set active range one below current active range, adding a new range if the current active range is the last one</li>
-						P: Switch the current range down one, adding a new range if the current range was the
-						last one
-					</li>
 				</ul>
 				<h2>Transition Types</h2>
 				<p>