Avoid theme reload

Seems to not work in Chromium without it, at least.

src/App.js

@@ -14,6 +14,12 @@ export default {
   data: () => ({
     mobileActivePanel: 'timeline'
   }),
+  created () {
+    const savedTheme = this.$store.state.config.savedTheme
+    if (savedTheme && (savedTheme !== this.$store.config.theme)) {
+      this.$store.dispatch('setOption', { name: 'theme', value: savedTheme })
+    }
+  },
   computed: {
     currentUser () { return this.$store.state.users.currentUser },
     background () {

src/components/style_switcher/style_switcher.js

@@ -14,6 +14,7 @@ export default {
   watch: {
     selected () {
       this.$store.dispatch('setOption', { name: 'theme', value: this.selected })
+      this.$store.dispatch('setOption', { name: 'savedTheme', value: this.selected })
     }
   }
 }

src/main.js

@@ -38,6 +38,7 @@ const persistedStateOptions = {
     'config.autoLoad',
     'config.hoverPreview',
     'config.muteWords',
+    'config.savedTheme',
     'statuses.notifications',
     'users.users'
   ]
@@ -89,8 +90,9 @@ new Vue({
 window.fetch('/static/config.json')
   .then((res) => res.json())
   .then(({name, theme, background, logo, registrationOpen}) => {
+    const themeToSet = store.state.config.savedTheme || theme
     store.dispatch('setOption', { name: 'name', value: name })
-    store.dispatch('setOption', { name: 'theme', value: theme })
+    store.dispatch('setOption', { name: 'theme', value: themeToSet })
     store.dispatch('setOption', { name: 'background', value: background })
     store.dispatch('setOption', { name: 'logo', value: logo })
     store.dispatch('setOption', { name: 'registrationOpen', value: registrationOpen })