Ensure that the loading indicator, in the pageNumber input, is hidden when the viewer is closed
Ensure that the loading indicator, in the pageNumber input, is hidden when the viewer is closed

Currently the indicator may remain visible even after the document has been closed, which seems weird given that no page is either visible nor rendering :-)

Snuffleupagus/pdf.js,mainegreen/pdf.js,xavier114fch/pdf.js,nawawi/pdf.js,timvandermeij/pdf.js,caremerge/pdf.js,nawawi/pdf.js,caremerge/pdf.js,macroplant/pdf.js,showpad/mozilla-pdf.js,macroplant/pdf.js,nawawi/pdf.js,Snuffleupagus/pdf.js,showpad/mozilla-pdf.js,Shoobx/pdf.js,mozilla/pdf.js,timvandermeij/pdf.js,timvandermeij/pdf.js,Shoobx/pdf.js,showpad/mozilla-pdf.js,mozilla/pdf.js,Shoobx/pdf.js,mainegreen/pdf.js,mozilla/pdf.js,xavier114fch/pdf.js,macroplant/pdf.js,Snuffleupagus/pdf.js