- Removed not used methods sortSelectedFields, removeSelectedField and addSelectedField from controllers/components/Filter

- Removed not used methods sortSelectedFields, addSelectedField and removeSelectedField from libraries/FilterCmptLib
- CSS fixes for FilterComponent and NavigationComponent
- Removed not used API calls from public/js/components/filter/API.js
- Added second level menu entries to the NavigationComponent
- Added new property side-menu to the FilterComponent to render the filters selection via the NavigationComponent or directly from the FilterComponent
- FilterComponent:
	- Column positioning is now managed by tabulator
	- Splitted the column selection from the filter options
	- Added the rendering of the filters selection via an optional dropdown
	- Changed the usability and the look of the filter options
	- German translation

public/js/components/navigation/Navigation.js

@@ -147,9 +147,20 @@ export const CoreNavigationCmpt = {
 							<!-- 2nd level -->
 							<template v-for="child in menu.children">
 								<li>
+								<span>
 									<a class="nav-link left-side-menu-link-entry" v-bind:href="child.link" @click=child.onClickCall>
 										&emsp;&emsp;{{ child.description }}
 									</a>
+									<a
+										class="nav-link left-side-menu-link-entry"
+										v-bind:class="child.subscriptLinkClass"
+										v-if="child.subscriptDescription"
+										v-bind:href="child.link"
+										@click=child.onClickSubscriptCall
+									>
+										{{ child.subscriptDescription }}
+									</a>
+								</span>
 								</li>
 							</template>
 						</ul>