added #top div element for back-to-top navigation
added #top div element for back-to-top navigation

mwolfien/galaxy-rna-workbench,mwolfien/galaxy-rna-workbench,bgruening/galaxy-rna-workbench,bgruening/galaxy-rna-workbench,mwolfien/galaxy-rna-workbench,bgruening/galaxy-rna-workbench