rename .btn-default to .btn-secondary

src/main/webapp/WEB-INF/orig/view/error/header.jsp

@@ -18,7 +18,7 @@
 							class="btn btn-primary">
 						<i class="fa fa-search"></i>
 					</button>
-					<button type="button" class="btn btn-default"
+					<button type="button" class="btn btn-secondary"
 							data-toggle="control-options" data-target="#searchOptions"
 							id="searchOptionsButton">
 						<i class="fa fa-cog"></i> <span class="sr-only"><la:message

src/main/webapp/WEB-INF/orig/view/profile/index.jsp

@@ -78,7 +78,7 @@
 					<!-- /.col -->
 					<div class="col-xs-8">
 						<la:link href="/"
-							styleClass="btn btn-default">
+							styleClass="btn btn-secondary">
 							<i class="fa fa-arrow-circle-left"></i>
 							<la:message key="labels.profile.back" />
 						</la:link>

src/main/webapp/WEB-INF/view/header.jsp

@@ -18,7 +18,7 @@ ${fe:facetForm()}${fe:geoForm()}
 						class="btn btn-primary">
 						<i class="fa fa-search"></i>
 					</button>
-					<button type="button" class="btn btn-default"
+					<button type="button" class="btn btn-secondary"
 						data-toggle="control-options" data-target="#searchOptions"
 						id="searchOptionsButton">
 						<i class="fa fa-cog"></i> <span class="sr-only"><la:message