Sort chapters by upload date (#3180)

* Added sorting by upload date

Spanish 'strings' contains the proper translation for the new feature.

* Added missing sorting cases handling

Previous commit missed some cases resulting in errors at runtime

* Implemented review changes

Shorter UI text and >= date comparison instead of >

app/src/main/res/menu/chapters.xml

@@ -64,6 +64,9 @@
                 <item
                     android:id="@+id/sort_by_number"
                     android:title="@string/sort_by_number" />
+                <item
+                    android:id="@+id/sort_by_upload_date"
+                    android:title="@string/sort_by_upload_date" />
             </group>
         </menu>
     </item>