Disable login button until ID & password entered

TODO.md

@@ -22,6 +22,7 @@
   - Keyboard flicking against top/bottom edge
   - Don't strip user spacing in html
 
+  - Do something when access token is invalid
   - [hr not working](https://bugreports.qt.io/browse/QTBUG-74342)
   - Terrible performance using `QT_QPA_PLATFORM=wayland-egl`, must use `xcb`
 

src/qml/Base/HInterfaceBox.qml

@@ -14,7 +14,7 @@ HScalingBox {
     function clickEnterButtonTarget() {
         for (let i = 0; i < buttonModel.length; i++) {
             let btn = interfaceButtonsRepeater.itemAt(i)
-            if (btn.name === enterButtonTarget) { btn.clicked() }
+            if (btn.enabled && btn.name === enterButtonTarget) btn.clicked()
         }
     }
 

src/qml/Pages/SignIn.qml

@@ -4,6 +4,8 @@ import "../Base"
 
 Item {
     property string loginWith: "username"
+    readonly property bool canLogin: idField.text && passwordField.text
+
     onFocusChanged: idField.forceActiveFocus()
 
     HInterfaceBox {
@@ -15,7 +17,7 @@ Item {
 
         buttonModel: [
             { name: "register", text: qsTr("Register"), enabled: false },
-            { name: "login", text: qsTr("Login"), enabled: true },
+            { name: "login", text: qsTr("Login"), enabled: canLogin },
             { name: "forgot", text: qsTr("Forgot?"), enabled: false }
         ]