Make escape leave bird's eye

KEYS

@@ -61,10 +61,10 @@ tunables
                           (only font name currently)
 
 bird's eye mode
+Ctrl-9/F9/esc           - leave bird's eye view
 (page)up/(page)down     - navigate
 home/end                - go to first/last page
 enter                   - select the page and leave bird's eye mode
-Ctrl-9/F9               - leave bird's eye view
 1st mouse button        - select the page under cursor and leave bird's eye mode
 
 outline/bookmark mode

main.ml

@@ -1261,7 +1261,15 @@ let viewkeyboard ~key ~x ~y =
   | None ->
       let c = Char.chr key in
       begin match c with
-      | '\027' | 'q' ->
+      | '\027' ->
+          begin match state.birdseye with
+          | None -> exit 0
+          | Some vals ->
+              birdseyeoff vals;
+              reshape conf.winw conf.winh
+          end;
+
+      | 'q' ->
           exit 0
 
       | '\008' ->