GODT-1741: GUI and CLI settings to change visibility of All Mail folder.

internal/frontend/qml/GeneralSettings.qml

@@ -156,6 +156,19 @@ SettingsView {
         Layout.fillWidth: true
     }
 
+    SettingsItem {
+        id: allMail
+        visible: root._isAdvancedShown
+        colorScheme: root.colorScheme
+        text: qsTr("Disable All Mail")
+        description: qsTr("Choose not to list the All Mail folder in your local client.")
+        type: SettingsItem.Toggle
+        checked: root.backend.isAllMailDisabled
+        onClicked: root.backend.changeIsAllMailDisabled(!allMail.checked )
+
+        Layout.fillWidth: true
+    }
+
     SettingsItem {
         id: ports
         visible: root._isAdvancedShown