Refactor tab change logic in PoliticsView to simplify loading conditions

- Updated the onTabChange method to remove unnecessary checks for existing data before loading current positions, open politics, and elections.
- This change enhances the clarity of the method and ensures that data is always loaded when the respective tab is selected.

frontend/src/views/falukant/PoliticsView.vue

@@ -206,13 +206,13 @@ export default {
     },
     methods: {
         onTabChange(tab) {
-            if (tab === 'current' && !this.currentPositions.length) {
+            if (tab === 'current') {
                 this.loadCurrentPositions();
             }
-            if (tab === 'openPolitics' && !this.openPolitics.length) {
+            if (tab === 'openPolitics') {
                 this.loadOpenPolitics();
             }
-            if (tab === 'elections' && !this.elections.length) {
+            if (tab === 'elections') {
                 this.loadElections();
             }
         },