Added check to prevent adding a module more than once

Few small bugfixes

root/styles/prosilver/template/portal/modules/news_center.html

@@ -8,7 +8,7 @@
 				<span class="portal-corners-bottom-inner"></span></div>
 			</div>
 		<!-- ELSE -->
-			<div style="margin-bottom: <!-- IF announcements_row.S_LAST_ROW -->0px<!-- ELSE -->1px<!-- ENDIF -->" class="post <!-- IF news_row.S_ROW_COUNT is odd -->bg1<!-- ELSE -->bg2<!-- ENDIF -->">
+			<div style="margin-bottom: <!-- IF news_row.S_LAST_ROW -->0px<!-- ELSE -->1px<!-- ENDIF -->" class="post <!-- IF news_row.S_ROW_COUNT is odd -->bg1<!-- ELSE -->bg2<!-- ENDIF -->">
 				<div class="inner"><span class="portal-corners-top-inner"></span>
 					<h4 class="first"><a name="n"></a><a name="n{news_row.N_ID}"></a><!-- IF news_row.S_UNREAD_INFO --><a href="{news_row.U_VIEW_UNREAD}">{NEWEST_POST_IMG}</a><!-- ELSE --><a href="{news_row.U_LAST_COMMENTS}">{READ_POST_IMG}</a><!-- ENDIF --> {news_row.ATTACH_ICON_IMG} <!-- IF news_row.S_POLL --><strong>{L_VIEW_TOPIC_POLL}</strong><!-- ENDIF --><!-- IF news_row.TOPIC_ICON_IMG --><img src="{T_ICONS_PATH}{news_row.TOPIC_ICON_IMG}" width="{news_row.TOPIC_ICON_IMG_WIDTH}" height="{news_row.TOPIC_ICON_IMG_HEIGHT}" alt="" /> <!-- ENDIF --><a href="{news_row.U_VIEW_COMMENTS}"><strong>{news_row.TITLE}</strong></a></h4>
 					<!-- IF news_row.PAGINATION --><strong class="pagination"><span>{news_row.PAGINATION}</span></strong><!-- ENDIF -->

root/styles/prosilver/template/portal/modules/stylechanger_side.html

@@ -1,4 +1,4 @@
-<!-- IF S_STYLE_OPTIONS and S_DISPLAY_CHANGE_STYLE -->
+<!-- IF S_STYLE_OPTIONS -->
 {$LR_BLOCK_H_L}<!-- IF $S_BLOCK_ICON --><img src="{$IMAGE_SRC}" width="{$IMAGE_WIDTH}" height="{$IMAGE_HEIGHT}" alt="" />&nbsp;<!-- ENDIF -->{$TITLE}{$LR_BLOCK_H_R}
 	<select style="width: 150px;" name="demo" id="demo" onchange="document.location.href = this.options[this.selectedIndex].value;">
 		{STYLE_SELECT}