misc: get donation date from settings manager

Change-Id: I4c39625b95efa1ad272ffa503e1f29228928adeb

src/app/settingsview/components/SystemSettingsPage.qml

@@ -84,7 +84,7 @@ SettingsPageBase {
             ToggleSwitch {
                 id: enableDonation
                 width: parent.width
-                visible: new Date() >= new Date(Date.parse("2023-11-01"))
+                visible: new Date() >= new Date(Date.parse(UtilsAdapter.getAppValue(Settings.Key.Donation2023VisibleDate)));
 
                 checked: UtilsAdapter.getAppValue(Settings.Key.IsDonationVisible)
                 labelText: JamiStrings.enableDonation

src/app/tipsmodel.cpp

@@ -76,7 +76,9 @@ TipsModel::reset()
     tips_.clear();
 
     QDate date = QDate::currentDate();
-    if (date >= QDate::fromString("2023-11-27", "yyyy-MM-dd")) {
+    QDate donationStartDate = QDate::fromString(
+        settingsManager_->getValue("Donation2023VisibleDate").toString());
+    if (date >= donationStartDate) {
         tips_.append({{"id", "14"}, {"title", tr("Donate")}, {"desc", ""}, {"type", "donation"}});
     }
     tips_.append({{"id", "0"}, {"title", tr("Customize")}, {"desc", ""}, {"type", "customize"}});