Tutorial S02 and tips: Mention holding shift for accelerated speed

One of these uses bold for the menu's name, the other uses italic, because that
seems more consistent with the other hints in the same context.

Re-attach the comment about upkeep to the correct [event], and move the comment
about the easter-egg event to the start of its [event].

data/campaigns/tutorial/scenarios/02_Tutorial_part_2.cfg

@@ -405,7 +405,7 @@ If either Shaman advances to become a Druid, then she’ll be able to heal adjac
         [/message]
     [/event]
 
-    # Mention upkeep and income
+    # Easter egg if you recruit all Shamans
     [event]
         name=recruit,recall
         [filter]
@@ -425,7 +425,6 @@ If either Shaman advances to become a Druid, then she’ll be able to heal adjac
 
         {CLEAR_PRINT}
 
-        # Easter egg if you recruit all Shamans
         [message]
             speaker=Galdrad
             message= _ "You certainly have a fondness for shamans, I see. They will provide a lot of healing, but not much offensive potential."
@@ -449,6 +448,7 @@ If either Shaman advances to become a Druid, then she’ll be able to heal adjac
         [/disallow_end_turn]
     [/event]
 
+    # Mention upkeep and income; or remind about undo if capturing a village without recruiting
     [event]
         name=capture
         first_time_only=no
@@ -1013,6 +1013,17 @@ Rest-healing is an exception to the rule — if a unit doesn’t do anything for
         [/message]
     [/event]
 
+    [event]
+        name=turn 12
+
+        [message]
+            speaker=narrator
+            caption= _ "Speeding Up Animations"
+            image=wesnoth-icon.png
+            message= _ "Holding down <b>shift</b> will make the animations for moving and fighting quicker. The <b>acceleration factor</b> can be set, and turned on by default, in the <b>Preferences</b> menu’s <b>General</b> tab."
+        [/message]
+    [/event]
+
     [event]
         name=turn 28
 

data/tips.cfg

@@ -263,6 +263,10 @@
     text= _ "If a unit is positioned next to healers from two allied sides, the unit will be healed on both sides’ turns. This way, a unit can be healed faster than otherwise possible."
     source= _ "<i>― Lord Tallin of Knalga, 538 YW</i>"
 [/tip]
+[tip]
+    text= _ "Holding down <b>shift</b> will make the animations for moving and fighting quicker. The <i>acceleration factor</i> can be set, and turned on by default, in the <i>Preferences</i> menu’s <i>General</i> tab."
+    source= _ "<i>― The Wesnoth Tactical Guide</i>"
+[/tip]
 [tip]
     # po: Translate "Change difficulty" and "Load Game" as in wesnoth-lib textdomain
     text= _ "Did you know that you can change the difficulty level during a campaign? Select the <i>Change difficulty</i> option at the bottom of the <i>Load Game</i> screen when loading start-of-scenario save files."