Add thumbnail-count option

sist2-vue/src/views/Configuration.vue

@@ -85,6 +85,10 @@
           <label>{{ $t("opt.slideDuration") }}</label>
           <b-form-input :value="optLightboxSlideDuration" type="number" min="1"
                         @input="setOptLightboxSlideDuration"></b-form-input>
+
+          <label>{{ $t("opt.vidPreviewInterval") }}</label>
+          <b-form-input :value="optVidPreviewInterval" type="number" min="50"
+                        @input="setOptVidPreviewInterval"></b-form-input>
         </b-card>
 
         <h4 class="mt-3">{{ $t("treemapOptions") }}</h4>
@@ -234,6 +238,7 @@ export default {
       "optHideLegacy",
       "optUpdateMimeMap",
       "optUseDatePicker",
+      "optVidPreviewInterval",
     ]),
     clientWidth() {
       return window.innerWidth;
@@ -279,6 +284,7 @@ export default {
       "setOptHideLegacy",
       "setOptUpdateMimeMap",
       "setOptUseDatePicker",
+      "setOptVidPreviewInterval",
     ]),
     onResetClick() {
       localStorage.removeItem("sist2_configuration");