Use the ?locale= query param instead of the &lang= token param.

Use the ?locale= query param instead of the &lang= token param.

* src/main/java/org/glom/web/client/place/ListPlace.java
* src/main/java/org/glom/web/client/place/DetailsPlace.java
* src/main/java/org/glom/web/client/place/HasSelectableTablePlace.java
Remove the lang token key and value.

* src/main/java/org/glom/web/client/ui/TableSelectionView.java
* src/main/java/org/glom/web/client/ui/TableSelectionViewImpl.java:
When the user selects a different locale from the chooser, use
Window.Location.assign() to change the URL, which then causes a reload.

* src/main/java/org/glom/web/client/Utils.java: Added getCurrentLocaleID().
* src/main/java/org/glom/web/client/activity/DetailsActivity.java
* src/main/java/org/glom/web/client/activity/DocumentSelectionActivity.java
* src/main/java/org/glom/web/client/activity/ListActivity.java
* src/main/java/org/glom/web/client/activity/TableSelectionActivity
* src/main/java/org/glom/web/client/ui/DocumentSelectionView.java
* src/main/java/org/glom/web/client/ui/DocumentSelectionViewImpl.java:
* src/main/java/org/glom/web/client/ui/ListView.java:
* src/main/java/org/glom/web/client/ui/ListViewImpl.java:

Remove localeID member variables and method/constructor parameters, instead
using Utils.getCurrentLocaleID() when we need a localID to pass to
OnlineGlomService.