Fix setting the signature outside of Vuex

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

src/components/SignatureSettings.vue

@@ -53,6 +53,7 @@ export default {
 	data() {
 		return {
 			loading: false,
+			signature: this.account.signature,
 		}
 	},
 	methods: {

src/store/actions.js

@@ -84,8 +84,8 @@ export default {
 	updateAccountSignature({commit}, {account, signature}) {
 		return updateSignature(account, signature).then(() => {
 			console.debug('account signature updated')
-			account.signature = signature
-			commit('editAccount', account)
+			const updated = Object.assign({}, account, {signature})
+			commit('editAccount', updated)
 			return account
 		})
 	},