OO-241: add more b_clearfix for tables, fix for Firefox, works better for IE7

src/main/java/org/olat/core/gui/components/table/_content/tablelayout.html

@@ -25,6 +25,7 @@
 			</select>
 		</form>
 	</div>
+	<div class="b_clearfix"><br/></div>
 #end
 
 #if ($tableEmpty)
@@ -68,6 +69,7 @@
 		#end
 		</div>
 	</div>
+	<div class="b_clearfix"></div>
 	$r.render("table", $tableConfig.getCssPrefix())
 #end
 </div>