Update manual with some new hotkeys.

This was SVN commit r18247.

binaries/data/mods/public/gui/manual/intro.txt

@@ -40,7 +40,7 @@ Finally change the settings. For random maps this includes the number of players
 When you are ready to start, click the "Start game" button.
 
 [font="sans-bold-16"]Hotkeys:
-[font="sans-bold-14"]Always
+[font="sans-bold-14"]Global
 [font="sans-14"]Alt + F4: Close the game, without confirmation
 Alt + Enter: Toggle between fullscreen and windowed
 ~ or F9: Show/hide console
@@ -63,7 +63,8 @@ ESC: Close all dialogs (chat, menu) or clear selected units
 Enter/return: Open/send chat
 T: Send team chat
 Pause: Pause/resume the game
-Delete: Delete currently selected unit/units/building/buildings
+Delete: Delete currently selected units/buildings
+Shift + Delete: Delete currently selected units/buildings without confirmation
 ,: Select idle fighters
 .: Select idle workers (including citizen soldiers)
 H: Stop (halt) the currently selected units.
@@ -73,6 +74,8 @@ Shift + 1 (to 0): Add control group 1 (to 0) to the selected units/buildings
 Ctrl + F5 (and so on up to F8): Mark the current camera position, for jumping back to later.
 F5, F6, F7, and F8: Move the camera to a marked position. Jump back to the last location if the camera is already over the marked position.
 Z, X, C, V, B, N, M: With training buildings selected. Add the 1st, 2nd, ... unit shown to the training queue for all the selected buildings.
+PageUp with units selected: highlights the units/buildings guarded by the selection.
+PageDown with units/buildings selected: highlights the units guarding the selection.
 
 [font="sans-bold-14"]Modify mouse action
 [font="sans-14"]Ctrl + Right Click on building: Garrison