Update controls_spinner_slider_scrollbar.bob

Change key combinations to remove ctrl + page up/down, because it behaves differently on two different system.

Author: wmliuanl

app/display/model/src/main/resources/examples/controls_spinner_slider_scrollbar.bob

@@ -72,8 +72,7 @@
     <text>The value can be adjusted both with the mouse and, when the widget is in focus, using the arrow keys and page up/down keys.
       Up/Down arrow keys and Page Up/Down keys will change the value by 1 step size
       Ctrl + Up/Down arrow keys will change the value by 5 x step size
-      Ctrl + Page Up/Down keys will change the value by 10 x step size
-      To make it up for some keyboard that need Fn keys to activate Page Up/Down, one can also use Ctrl Left/Right arrow keys to make changes at 10 x step szie
+      Ctrl + Left/Right arrow keys to make changes at 10 x step szie
 
 The "increment" property of the widget determines the step size when using the keyboard.</text>
     <x>141</x>