Add a shared dictionary to the project.

.gitignore

@@ -48,7 +48,6 @@ captures/
 .idea/navEditor.xml
 .idea/tasks.xml
 .idea/workspace.xml
-.idea/dictionaries
 .idea/libraries
 # Android Studio 3 in .gitignore file.
 .idea/caches

.idea/dictionaries/shared.xml

@@ -0,0 +1,8 @@
+<component name="ProjectDictionaryState">
+    <dictionary name="shared">
+        <words>
+            <w>backstack</w>
+            <w>textfields</w>
+        </words>
+    </dictionary>
+</component>