Fix event category filter

Note: You have to set the category mode in the sf_event_mgt plugin to "show selected categories (or)" instead of "ignore category selection"

html/typo3conf/ext/t3org_layout/Resources/Private/Extensions/SfEventMgt/Templates/Event/List.html

@@ -60,30 +60,15 @@
 <f:section name="Filter">
     <f:if condition="{settings.templateLayout} == '2'">
         <f:else>
-        <f:form class="event-filter">
-            <f:form.select
-                class="custom-select"
-                name="event_filter"
-                additionalAttributes="{onchange:'this.form.submit()'}">
-
+            <f:form class="event-filter">
+            <f:form.select class="custom-select" name="event-filter-neu" additionalAttributes="{onchange: 'location = this.value;'}">
                 <f:for each="{categories}" as="category">
-                    <option value="{category.uid}">
-                        <f:if condition="{overwriteDemand.category} == {category.uid}">
-                            <f:then>
-                                <f:link.action action="list" controller="Event" arguments="{overwriteDemand:{category: category}}" class="active">
-                                    {category.title}
-                                </f:link.action>
-                            </f:then>
-                            <f:else>
-                                <f:link.action action="list" controller="Event" arguments="{overwriteDemand:{category: category}}">
-                                    {category.title}
-                                </f:link.action>
-                            </f:else>
-                        </f:if>
+                    <option value="{f:uri.action(action: 'List', controller: 'Event', arguments: '{overwriteDemand:{category: category}}')}" {f:if(condition: '{overwriteDemand.category} == {category.uid}', then: 'class="active" selected="selected"')}>
+                    {category.title}
                     </option>
                 </f:for>
             </f:form.select>
-        </f:form>
+            </f:form>
         </f:else>
     </f:if>
 </f:section>