Resolve "Add a nice toggle button between modes"

Closes #34 (closed)

android/gradle.properties

 org.gradle.jvmargs=-Xmx1536M
 android.useAndroidX=true
 android.enableJetifier=true
-app.versionName=0.1.11
-app.versionCode=32
+app.versionName=0.1.12
+app.versionCode=33