Add missing screenGeometryChanged signal; use in AppletInterface; fix typos.

Reviewed-by: Marco Martin

BUG:373075

src/plasma/corona.h

@@ -292,15 +292,20 @@ Q_SIGNALS:
     void configSynced();
 
     /**
-     * This signal indicates that a change in available screen gemetry occurred.
+     * This signal indicates that a change in available screen geometry occurred.
      */
     void availableScreenRegionChanged();
 
     /**
-     * This signal indicates that a change in available screen gemetry occurred.
+     * This signal indicates that a change in available screen geometry occurred.
      */
     void availableScreenRectChanged();
 
+    /**
+     * This signal indicates that a change in geometry for the screen occurred.
+     */
+    void screenGeometryChanged(int id);
+
     /**
      * emitted when immutability changes.
      * this is for use by things that don't get constraints events, like plasmaapp.

src/scriptengines/qml/plasmoid/appletinterface.cpp

@@ -107,7 +107,18 @@ AppletInterface::AppletInterface(DeclarativeAppletScript *script, const QVariant
 
     if (applet()->containment()) {
         connect(applet()->containment(), &Plasma::Containment::screenChanged,
-                this, &ContainmentInterface::screenChanged);
+                this, &AppletInterface::screenChanged);
+
+        // Screen change implies geo change for good measure.
+        connect(applet()->containment(), &Plasma::Containment::screenChanged,
+                this, &AppletInterface::screenGeometryChanged);
+
+        connect(applet()->containment()->corona(), &Plasma::Corona::screenGeometryChanged, this, [this](int id) {
+            if (id == applet()->containment()->screen()) {
+                emit screenGeometryChanged();
+            }
+        });
+
     }
 
     connect(this, &AppletInterface::expandedChanged, [=](bool expanded) {

src/scriptengines/qml/plasmoid/appletinterface.h

@@ -195,7 +195,7 @@ class AppletInterface : public PlasmaQuick::AppletQuickItem
      * Provides access to the geometry of the applet is in.
      * Can be useful to figure out what's the absolute position of the applet.
      */
-    Q_PROPERTY(QRect screenGeometry READ screenGeometry NOTIFY screenChanged)
+    Q_PROPERTY(QRect screenGeometry READ screenGeometry NOTIFY screenGeometryChanged)
 
     /**
      * Whether the dialog should be hidden when the dialog loses focus.
@@ -429,6 +429,7 @@ Q_SIGNALS:
     void backgroundHintsChanged();
     void busyChanged();
     void screenChanged();
+    void screenGeometryChanged();
     void hideOnWindowDeactivateChanged();
     void associatedApplicationChanged();
     void associatedApplicationUrlsChanged();