consolidate duplicate ConfigureOptionsAction classes

there were two nearly identical ConfigureOptionsAction classes defined
    * src/com/limegroup/gnutella/gui/actions/ConfigureOptionsAction.java
    * src/com/limegroup/gnutella/gui/options/ConfigureOptionsAction.java

the multi-argument constructor of the former was unused
its single-argument constructor was referencd only once in:
    * src/com/limegroup/gnutella/gui/shell/ShellAssociationManager.java

the single-argument constructor of the latter was unused
its multi-argument constructor was referencd three times in:
    * src/com/frostwire/gui/library/AbstractLibraryTableMediator.java
    * src/com/frostwire/gui/library/LibraryExplorer.java
    * src/com/frostwire/gui/library/LibraryPlaylists.java
Merge pull request #361 from bill-auger/consolidate-duplicate-classes

consolidate duplicate ConfigureOptionsAction classes