Fixed typo in readme

README.md

@@ -80,7 +80,7 @@ Once you’re up and running, you can choose an issue to start working on from h
 
 Issues tagged as [good first issue](https://github.com/odk-x/tool-suite-X/issues?q=is%3Aissue+is%3Aopen+label%3A%22good+first+issue%22) should be a good place to start.
 
-Pull requests are welcome, though please submit them against the development branch. We prefer verbose descriptions of the change you are submitting. If you are fixing a bug please provide steps to reproduce it or a link to a an issue that provides that information. If you are submitting a new feature please provide a description of the need or a link to a forum discussion about it. 
+Pull requests are welcome, though please submit them against the development branch. We prefer verbose descriptions of the change you are submitting. If you are fixing a bug, please provide steps to reproduce it or a link to an issue that provides that information. If you are submitting a new feature, please provide a description of the need or a link to a forum discussion about it. 
 
 ## Links for users
 This document is aimed at helping developers and technical contributors. For information on how to get started as a user of ODK-X, see our [online documentation](https://docs.odk-x.org), or to learn more about the Open Data Kit project, visit [https://odk-x.org](https://odk-x.org).

broken_tests/src/org/opendatakit/tables/fragments/AbsWebTableFragmentStub.java

@@ -65,4 +65,13 @@ public void databaseUnavailable() {
     // we assume the service connection is mocked and does not require any of these calls
   }
 
+  @Override
+  public void onBackPressed() {
+    if (ODKWebView.canGoBack()) {
+      ODKWebView.goBack();
+    } else {
+      super.onBackPressed();
+    }
+  }
+
 }

tables_app/src/main/java/org/opendatakit/tables/activities/AbsBaseActivity.java

@@ -17,8 +17,11 @@
 
 import androidx.fragment.app.Fragment;
 import androidx.fragment.app.FragmentManager;
+import android.app.Activity;
+import android.app.AlertDialog;
 import android.content.ActivityNotFoundException;
 import android.content.ComponentName;
+import android.content.DialogInterface;
 import android.content.Intent;
 import android.os.Bundle;
 import android.os.Handler;

tables_app/src/main/java/org/opendatakit/tables/activities/AbsBaseWebActivity.java

@@ -1,5 +1,6 @@
 package org.opendatakit.tables.activities;
 
+import android.app.Activity;
 import android.content.ActivityNotFoundException;
 import android.content.Intent;
 import android.net.Uri;
@@ -83,7 +84,7 @@ public abstract class AbsBaseWebActivity extends AbsTableActivity implements IOd
   // no need to preserve
   private PropertyManager mPropertyManager;
 
-  public abstract String getInstanceId();
+    public abstract String getInstanceId();
 
   /**
    * Gets the active webkit view

tables_app/src/main/java/org/opendatakit/tables/activities/MainActivity.java

@@ -21,8 +21,10 @@
 import androidx.fragment.app.FragmentManager;
 import androidx.fragment.app.FragmentManager.BackStackEntry;
 import androidx.fragment.app.FragmentTransaction;
+import android.app.AlertDialog;
 import android.content.ActivityNotFoundException;
 import android.content.ComponentName;
+import android.content.DialogInterface;
 import android.content.Intent;
 import android.os.Bundle;
 import android.view.Menu;
@@ -299,7 +301,21 @@ public void initializationCompleted() {
 
   @Override
   public void onBackPressed() {
-    popBackStack();
+    new AlertDialog.Builder(this)
+            .setIcon(android.R.drawable.ic_dialog_alert)
+            .setTitle("Closing Application")
+            .setMessage("Are you sure you want to close this application?")
+            .setPositiveButton("Yes", new DialogInterface.OnClickListener()
+            {
+              @Override
+              public void onClick(DialogInterface dialog, int which) {
+                finish();
+              }
+
+            })
+            .setNegativeButton("No", null)
+            .show();
+    //popBackStack();
   }
 
   /**