Use a more compact format for the fallback EventBus-listeners in `PDFViewerApplication_initializeJavaScript`
Use a more compact format for the fallback EventBus-listeners in `PDFViewerApplication_initializeJavaScript`

Given that these event listeners should essentially never be needed, but are included simply to avoid breakage in edge-cases, it can't hurt to make this code slightly less verbose.

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