Add option to reset all config values to their default

Closes network/neochat#504

src/controller.cpp

@@ -414,4 +414,11 @@ bool Controller::csSupported() const
 #endif
 }
 
+void Controller::revertToDefaultConfig()
+{
+    const auto config = NeoChatConfig::self();
+    config->setDefaults();
+    config->save();
+}
+
 #include "moc_controller.cpp"

src/controller.h

@@ -108,6 +108,14 @@ public:
 
     bool csSupported() const;
 
+    /**
+     * @brief Revert all configuration values to their default.
+     *
+     * The parameters along with their defaults are specified in the config file
+     * neochatconfig.kcfg.
+     */
+    Q_INVOKABLE void revertToDefaultConfig();
+
 private:
     explicit Controller(QObject *parent = nullptr);
 

src/settings/NeoChatGeneralPage.qml

@@ -246,4 +246,13 @@ FormCard.FormCardPage {
             });
         }
     }
+    FormCard.FormHeader {
+        title: i18nc("@title", "Default Settings")
+    }
+    FormCard.FormCard {
+        FormCard.FormButtonDelegate {
+            text: i18nc("@action:button", "Reset all configuration values to their default")
+            onClicked: Controller.revertToDefaultConfig()
+        }
+    }
 }