Allow multiple servers in settings

src/mainwindow.cpp

@@ -408,9 +408,13 @@ void MainWindow::setupSettingsModal() {
         // Fetch prices
         settings.chkFetchPrices->setChecked(Settings::getInstance()->getAllowFetchPrices());
         
+        // List of default servers
+        settings.cmbServer->addItem("https://lightd-main.zecwallet.co:443");
+        settings.cmbServer->addItem("https://lightd-main.zcashfr.io:443");
+
         // Load current values into the dialog        
         auto conf = Settings::getInstance()->getSettings();
-        settings.txtServer->setText(conf.server);
+        settings.cmbServer->setCurrentText(conf.server);
 
         // Connection tab by default
         settings.tabWidget->setCurrentIndex(0);
@@ -429,11 +433,15 @@ void MainWindow::setupSettingsModal() {
             Settings::getInstance()->setAllowFetchPrices(settings.chkFetchPrices->isChecked());
 
             // Save the server
-            Settings::getInstance()->saveSettings(settings.txtServer->text().trimmed());
+            bool reloadConnection = false;
+            if (conf.server != settings.cmbServer->currentText().trimmed()) {
+                reloadConnection = true;
+            }
+            Settings::getInstance()->saveSettings(settings.cmbServer->currentText().trimmed());
 
-            if (false /* connection needs reloading?*/) {
+            if (reloadConnection) {
                 // Save settings
-                Settings::getInstance()->saveSettings(settings.txtServer->text());
+                Settings::getInstance()->saveSettings(settings.cmbServer->currentText());
                 
                 auto cl = new ConnectionLoader(this, rpc);
                 cl->loadConnection();

src/settings.ui

@@ -10,12 +10,6 @@
     <height>539</height>
    </rect>
   </property>
-  <property name="minimumSize">
-   <size>
-    <width>540</width>
-    <height>500</height>
-   </size>
-  </property>
   <property name="windowTitle">
    <string>Settings</string>
   </property>
@@ -57,14 +51,15 @@
         </widget>
        </item>
        <item>
-        <widget class="QLineEdit" name="txtServer">
-         <property name="placeholderText">
-          <string/>
-         </property>
-        </widget>
-       </item>
-       <item>
-        <layout class="QVBoxLayout" name="verticalLayout_2"/>
+        <layout class="QVBoxLayout" name="verticalLayout_2">
+         <item>
+          <widget class="QComboBox" name="cmbServer">
+           <property name="editable">
+            <bool>true</bool>
+           </property>
+          </widget>
+         </item>
+        </layout>
        </item>
        <item>
         <spacer name="verticalSpacer">