plugins/nightlight: clarify strings for inhibition

To clarify that the toggle action merely temporarily disables the blue light filter, rather than turning the schedule off permanently like the "Disbaled" setting in the KCM does, use "suspend/resume" terminology instead of "off/on" in the keyboard shortcut and OSD.

Follow-up on plasma-workspace!4262

CCBUG: 486647

src/plugins/nightlight/nightlightmanager.cpp

@@ -64,8 +64,8 @@ NightLightManager::NightLightManager()
                                                                            : QStringLiteral("redshift-status-on");
 
         const QString text = isInhibited()
-            ? i18nc("Night Light was disabled", "Night Light Off")
+            ? i18nc("Night Light was temporarily disabled", "Night Light Suspended")
-            : i18nc("Night Light was enabled", "Night Light On");
+            : i18nc("Night Light was reenabled from temporary suspension", "Night Light Resumed");
 
         QDBusMessage message = QDBusMessage::createMethodCall(
             QStringLiteral("org.kde.plasmashell"),
@@ -86,7 +86,7 @@ NightLightManager::NightLightManager()
     QAction *toggleAction = new QAction(this);
     toggleAction->setProperty("componentName", QStringLiteral("kwin"));
     toggleAction->setObjectName(QStringLiteral("Toggle Night Color"));
-    toggleAction->setText(i18n("Toggle Night Light"));
+    toggleAction->setText(i18nc("Temporarily disable/reenable Night Light", "Suspend/Resume Night Light"));
     KGlobalAccel::setGlobalShortcut(toggleAction, QList<QKeySequence>());
     connect(toggleAction, &QAction::triggered, this, &NightLightManager::toggle);