nanorc: Clean up key bindings

* Reorder key bindings
* Remove unused unbindings

nanorc

@@ -274,32 +274,26 @@ bind ^H chopwordleft main
 bind ^H help all
 bind ^H exit help
 bind ^W exit all
-#bind ^S savefile main
 bind M-S writeout main
 bind ^O insert main
 bind ^F whereis all
-bind M-F findnext all
-#bind ^B wherewas all
-bind Sh-M-F findprevious all
 bind ^R replace main
-#bind M-X flipnewbuffer all
 bind ^X cut all
-bind ^C copy main
 bind ^V paste all
 #bind ^P location main
-#bind ^A mark main
-unbind ^K main
-unbind ^U all
-#unbind ^N main
-#unbind ^Y all
-#unbind M-J main
-#unbind M-T main
 #bind ^T gotoline main
-#bind ^T gotodir browser
-#bind ^Y speller main
-bind ^Z undo main
-bind ^Y redo main
 #bind ^U undo main
+bind ^Z undo main
 #bind ^E redo main
+bind ^Y redo main
+#bind ^A mark main
+bind ^C copy main
+#bind ^B wherewas all
+bind Sh-M-F findprevious all
+bind M-F findnext all
 bind M-C comment main
+#bind ^Y speller main
+#bind ^S savefile main
+#bind M-X flipnewbuffer all
+#bind ^T gotodir browser
 #set multibuffer