fixes in settings view and message deletion

src/views/settings-view.jsx

@@ -32,7 +32,6 @@ export default class SettingsView extends React.PureComponent {
 
   handleServerAddressChange(name) {
     this.setState({serverAddress: name});
-    this.props.onServerAddressChange(name);
   }
 
   render() {

src/views/sidepanel-view.jsx

@@ -114,7 +114,6 @@ class SidepanelView extends React.Component {
           <SettingsView
             transport={this.props.transport}
             serverAddress={this.props.serverAddress}
-            onServerAddressChange={this.props.onGlobalSettings}
             onCancel={this.props.onCancel}
             onUpdate={this.props.onGlobalSettings} /> :
 

src/widgets/context-menu.jsx

@@ -170,15 +170,19 @@ class ContextMenu extends React.Component {
       console.log("Topic not found: ", params.topicName);
       return;
     }
+
     // We don't know if the message is still pending (e.g. attachment is being uploaded),
     // so try cancelling first. No harm if we can't cancel.
-    if (topic.cancelSend(params.seq)) {
-      return Promise.resolve();
+    // The message can be cancelled if transmission to the server has not
+    // started yet or if the message send has failed.
+    if (!all && topic.cancelSend(params.seq)) {
+      return;
     }
     // Can't cancel. Delete instead.
-    var promise = all ?
+    let promise = all ?
       topic.delMessagesAll(hard) :
       topic.delMessagesList([params.seq], hard);
+
     promise.catch((err) => {
       if (errorHandler) {
         errorHandler(err.message, 'err');