fix: apply proper zindex to modal dialogs

frontend/src/components/prompts/BaseModal.vue

@@ -1,5 +1,6 @@
 <template>
   <VueFinalModal
+    class="vfm-modal"
     overlay-transition="vfm-fade"
     content-transition="vfm-fade"
     @closed="layoutStore.closeHovers"
@@ -7,7 +8,6 @@
       initialFocus: '#focus-prompt',
       fallbackFocus: 'div.vfm__content',
     }"
-    style="z-index: 9999999"
   >
     <slot />
   </VueFinalModal>

frontend/src/css/base.css

@@ -178,3 +178,7 @@ html[dir="rtl"] .breadcrumbs a {
 .vue-number-input__button::after {
   background: var(--textSecondary) !important;
 }
+
+.vfm-modal {
+  z-index: 9999999 !important;
+}