close the app when no permission to storage is given

app/src/main/java/com/simplemobiletools/gallery/activities/MainActivity.java

@@ -117,6 +117,7 @@ public class MainActivity extends AppCompatActivity
                 initializeGallery();
             } else {
                 Toast.makeText(this, getResources().getString(R.string.no_permissions), Toast.LENGTH_SHORT).show();
+                finish();
             }
         }
     }

app/src/main/res/values/strings.xml

@@ -1,7 +1,7 @@
 <resources>
     <string name="app_name">Simple Gallery</string>
     <string name="share_via">Share via</string>
-    <string name="no_permissions">Not much to do in a gallery without accessing your photos and videos</string>
+    <string name="no_permissions">Not much to do in a gallery without accessing your storage</string>
     <string name="delete">Delete</string>
     <string name="deleting">Deleting</string>
     <string name="edit">Edit</string>