Show subscription window when user has no subscription

app/src/main/java/net/pokeranalytics/android/ui/fragment/SettingsFragment.kt

@@ -12,6 +12,7 @@ import kotlinx.android.synthetic.main.fragment_settings.*
 import net.pokeranalytics.android.BuildConfig
 import net.pokeranalytics.android.R
 import net.pokeranalytics.android.model.realm.Session
+import net.pokeranalytics.android.ui.activity.BillingActivity
 import net.pokeranalytics.android.ui.activity.CurrenciesActivity
 import net.pokeranalytics.android.ui.activity.DataListActivity
 import net.pokeranalytics.android.ui.activity.GDPRActivity
@@ -100,6 +101,11 @@ class SettingsFragment : PokerAnalyticsFragment(), RowRepresentableDelegate, Sta
 
 	override fun onRowSelected(position: Int, row: RowRepresentable, fromAction: Boolean) {
 		when (row) {
+			SettingRow.SUBSCRIPTION -> {
+				if (!AppGuard.isProUser) {
+					BillingActivity.newInstance(requireContext())
+				}
+			}
 			SettingRow.RATE_APP -> parentActivity.openPlayStorePage()
 			SettingRow.CONTACT_US -> parentActivity.openContactMail(R.string.contact)
 			SettingRow.BUG_REPORT -> parentActivity.openContactMail(R.string.bug_report_subject, Realm.getDefaultInstance().path)