Kill redundancy

1) “Bullet” does not need “point” for you to understand
   what it is
2) Not all typographical bullets have the form of a point

Change-Id: I054edd8bff51053b763c11321b32f513a1a6c142

cui/source/tabpages/strings.src

@@ -165,7 +165,7 @@ String RID_SVXSTR_RIGHT_MARGIN
 };
 String RID_SVXSTR_NUM
 {
-    Text [ en-US ] = "Bulleted and numbered lists. Bullet point symbol: " ;
+    Text [ en-US ] = "Bulleted and numbered lists. Bullet symbol: " ;
 };
 String RID_SVXSTR_BORDER
 {