responsiveness adjustments;

src/views/Notes.vue

@@ -27,7 +27,7 @@
             <h5><i class="fa fa-pen"></i> Notizen</h5>
         </div>
         <template v-for="(note, noteIndex) in $store.state.notes" v-bind:key="noteIndex">
-            <div v-if="colorToFilter === '' || note.color === colorToFilter" class="col-sm-4 col-md-3 col-lg-2 card-box">
+            <div v-if="colorToFilter === '' || note.color === colorToFilter" class="col-sm-6 col-md-4 col-lg-3 card-box">
                 <div class="card">
                     <div class="card-body note"
                          :style="'background-color:' + note.color ?? '#ffea77'">