OnlineGlomService: Simplify the getList/RelatedViewData() methods.

OnlineGlomService: Simplify the getList/RelatedViewData() methods.

* src/main/java/org/glom/web/client/OnlineGlomService.java
* src/main/java/org/glom/web/client/OnlineGlomServiceAsync.java
* src/main/java/org/glom/web/server/OnlineGlomServiceImpl.java
Remove getSortedListViewData() and getSortedRelatedListData(), adding
the sort column index and ascending bool to the regular method.
Instead, a sort column index of -1 now means no sort.
This is less explicit, but it's fairly simple, reduces the amount of
code, and makes the OnlineGlomService API slightly smaller.
* src/main/java/org/glom/web/client/ui/details/RelatedListTable.java:
* src/main/java/org/glom/web/client/ui/list/ListViewTable.java:
getDataProvider():
* src/main/java/org/glom/web/server/ConfiguredDocument.java:
getListViewData(), getRelatedListData():
* src/main/java/org/glom/web/server/OnlineGlomServiceImpl.java:
getListViewData(), getRelatedListData():
* src/main/java/org/glom/web/server/database/ListDBAccess.java:
getListData():
* src/main/java/org/glom/web/server/database/ListViewDBAccess.java:
getData():
* src/main/java/org/glom/web/server/database/RelatedListDBAccess.java:
getData(): Adapted.