fix #81, reset logo

components/admin/Settings.vue

@@ -32,7 +32,9 @@
           accept='image/png'
           :limit='1'
           :multiple='false')
-        el-button(slot='trigger' size='small' type='primary' plain) Select file
+          el-button-group
+            el-button(size='small' type='primary' plain) Select file
+            el-button(size='small' type='success' plain @click='resetLogo') Reset
         .el-upload__tip(slot='tip') png files with a size less than 500kb
       el-image(:src='`${settings.baseurl}/favicon.ico?${logoKey}`')
       el-switch.d-block.mt-4(v-model='allow_registration'
@@ -106,6 +108,11 @@ export default {
       this.$refs.upload.clearFiles()
       this.logoKey++
     },
+    resetLogo (e) {
+      this.setSetting({ key: 'favicon', value: null })
+        .then(this.forceLogoReload)
+      e.stopPropagation()
+    },
     save (key, value) {
       if (this.settings[key] !== value) {
         this.setSetting({ key, value })