mentioned bug in tab-switcher, made shadow-control work in zero-state

src/components/shadow_control/shadow_control.js

@@ -37,9 +37,12 @@ export default {
       this.selectedId += 1
     }
   },
+  beforeUpdate () {
+    this.cValue = this.value || this.fallback
+  },
   computed: {
     selected () {
-      return this.cValue[this.selectedId] || {
+      return this.isReady && this.cValue[this.selectedId] || {
         x: 0,
         y: 0,
         blur: 0,
@@ -50,13 +53,17 @@ export default {
       }
     },
     moveUpValid () {
-      return this.selectedId > 0
+      return this.isReady && this.selectedId > 0
     },
     moveDnValid () {
-      return this.selectedId < this.cValue.length - 1
+      return this.isReady && this.selectedId < this.cValue.length - 1
+    },
+    isReady () {
+      return typeof this.cValue !== 'undefined'
     },
     present () {
-      return typeof this.cValue[this.selectedId] !== 'undefined' &&
+      return this.isReady &&
+        typeof this.cValue[this.selectedId] !== 'undefined' &&
         !this.usingFallback
     },
     usingFallback () {
@@ -66,9 +73,9 @@ export default {
       return hex2rgb(this.selected.color)
     },
     style () {
-      return {
+      return this.isReady ? {
         boxShadow: getCssShadow(this.cValue)
-      }
+      } : {}
     }
   }
 }

src/components/shadow_control/shadow_control.vue

@@ -43,7 +43,7 @@
       <label for="shadow-switcher" class="select">
         <select
           v-model="selectedId" class="shadow-switcher"
-          :disabled="usingFallback"
+          :disabled="!isReady || usingFallback"
           id="shadow-switcher">
           <option v-for="(shadow, index) in cValue" :value="index">
             {{$t('settings.style.shadows.shadow_id', { value: index })}}
@@ -51,7 +51,7 @@
         </select>
         <i class="icon-down-open"/>
       </label>
-      <button class="btn btn-default" :disabled="!present" @click="del">
+      <button class="btn btn-default" :disabled="!isReady || !present" @click="del">
         <i class="icon-cancel"/>
       </button>
       <button class="btn btn-default" :disabled="!moveUpValid" @click="moveUp">
@@ -60,7 +60,7 @@
       <button class="btn btn-default" :disabled="!moveDnValid" @click="moveDn">
         <i class="icon-down-open"/>
       </button>
-      <button class="btn btn-default" @click="add">
+      <button class="btn btn-default" :disabled="!isReady" @click="add">
         <i class="icon-plus"/>
       </button>
     </div>
@@ -137,7 +137,6 @@
   flex-wrap: wrap;
   justify-content: center;
 
-
   .shadow-preview-container,
   .shadow-tweak {
     margin: 5px 6px 0 0;