[Lazarus] Patch for Screen.BeginWaitCursor

[AlexeyT]

Docs have wrong name

       <element name="TScreen.BeginTempCursor">
         <short>Override the Cursor property with a temporary value. Use 
EndTempCursor to release it.</short>
       </element>
       <element name="TScreen.EndTempCursor">
         <short>Release the temporary cursor set with 
BeginTempCursor.</short>
       </element>

-- 
Regards,
Alexey