Prepared longer running PDFView operations feedback
Show navigation pane in DocumentFrame based on user preference and the existence of bookmarks in the document

git-svn-id: http://devserv/svn/fluxdvd/components/wxPDFView/trunk@8242 ee4118f4-65c3-8c42-83c6-dbb17464b6b1
Splitted activity reporting for easier usage in derived frames

git-svn-id: http://devserv/svn/fluxdvd/components/wxPDFView/trunk@8243 ee4118f4-65c3-8c42-83c6-dbb17464b6b1