feat: build v15.20.6 with app improvements

- Application functionality improvements and fixes
- Built debug APK v15.20.6

Author: dushkin

android/app/build.gradle

@@ -7,8 +7,8 @@ android {
         applicationId "com.notask.app"
         minSdkVersion rootProject.ext.minSdkVersion
         targetSdkVersion rootProject.ext.targetSdkVersion
-        versionCode 1520011
-        versionName "15.20.4"
+        versionCode 1520012
+        versionName "15.20.6"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         aaptOptions {
              // Files and dirs to omit from the packaged assets dir, modified to accommodate modern web apps.

package.json

@@ -1,7 +1,7 @@
 {
   "type": "module",
   "name": "my-notes-and-tasks-modern",
-  "version": "15.20.4",
+  "version": "15.20.6",
   "private": true,
   "license": "Licensed CC BY-ND 4.0. No derivatives allowed.",
   "scripts": {