Jenkins uses release dates only + APK delete bugfix

lib/app_sources/jenkins.dart

@@ -5,6 +5,10 @@ import 'package:obtainium/custom_errors.dart';
 import 'package:obtainium/providers/source_provider.dart';
 
 class Jenkins extends AppSource {
+  Jenkins() {
+    overrideVersionDetectionFormDefault('releaseDateAsVersion', true);
+  }
+
   @override
   String trimJobUrl(String url) {
     RegExp standardUrlRegEx = RegExp('.*/job/[^/]+');

lib/pages/add_app.dart

@@ -166,7 +166,9 @@ class _AddAppPageState extends State<AddAppPage> {
           if (appsProvider.apps.containsKey(app.id)) {
             throw ObtainiumError(tr('appAlreadyAdded'));
           }
-          if (app.additionalSettings['trackOnly'] == true) {
+          if (app.additionalSettings['trackOnly'] == true ||
+              app.additionalSettings['versionDetection'] !=
+                  'standardVersionDetection') {
             app.installedVersion = app.latestVersion;
           }
           app.categories = pickedCategories;

lib/providers/apps_provider.dart

@@ -212,7 +212,7 @@ class AppsProvider with ChangeNotifier {
         var fn = file.path.split('/').last;
         if (fn.startsWith('${app.id}-') &&
             fn.endsWith('.apk') &&
-            fn != fileName) {
+            fn != downloadedFile.path.split('/').last) {
           file.delete();
         }
       }

lib/providers/source_provider.dart

@@ -320,6 +320,22 @@ abstract class AppSource {
     name = runtimeType.toString();
   }
 
+  overrideVersionDetectionFormDefault(String vd, bool disableStandard) {
+    additionalAppSpecificSourceAgnosticSettingFormItems =
+        additionalAppSpecificSourceAgnosticSettingFormItems.map((e) {
+      return e.map((e2) {
+        if (e2.key == 'versionDetection') {
+          var item = e2 as GeneratedFormDropdown;
+          item.defaultValue = vd;
+          if (disableStandard) {
+            item.disabledOptKeys = ['standardVersionDetection'];
+          }
+        }
+        return e2;
+      }).toList();
+    }).toList();
+  }
+
   String standardizeUrl(String url) {
     url = preStandardizeUrl(url);
     if (!hostChanged) {
@@ -342,7 +358,7 @@ abstract class AppSource {
       [];
 
   // Some additional data may be needed for Apps regardless of Source
-  final List<List<GeneratedFormItem>>
+  List<List<GeneratedFormItem>>
       additionalAppSpecificSourceAgnosticSettingFormItems = [
     [
       GeneratedFormSwitch(