Feature/style unification (#420)

* set global icons

* fixes #419

* button style docs

* category/tag page updates

* dynamic router imports

Co-authored-by: hay-kot <hay-kot@pm.me>

frontend/src/components/UI/Dialogs/BackupDialog.vue

@@ -9,7 +9,7 @@
     >
       <template v-slot:open="{ open }">
         <v-btn @click="open" class="mx-2" small :color="color">
-          <v-icon left> mdi-plus </v-icon> {{ $t("general.custom") }}
+          <v-icon left> {{ $globals.icons.create }} </v-icon> {{ $t("general.custom") }}
         </v-btn>
       </template>
       <v-card-text class="mt-6">
@@ -128,7 +128,6 @@ export default {
         templates: this.selectedTemplates,
       };
 
-
       if (await api.backups.create(data)) {
         this.$emit("created");
       }