Show related list tables in notebooks (again).

Show related list tables in notebooks (again).

Calculate the height of the related list tables so the Notebook can be
set the correct height. The height of the related list table is also needed by
FlowTable to be able decide how to create the layout.

* src/main/java/org/glom/web/client/ui/details/Portal.java: Calculate
and set the Portal height based on the height of the related list
table and the Portal container.
* src/main/java/org/glom/web/client/ui/details/RelatedListTable.java:
Add method to calculate the height of the related list tables.
* src/main/java/org/glom/web/client/ui/list/ListTable.java:
* src/main/webapp/style.css: Add css class for Pager. This is needed to
calculate the height of the Pager widget.