Fix misc
- Fix vuetify upgrade css issues
- Fix #6 (closed) by creating function to replace [mdi-xxx] from i18n labels by actual icon
- Fix issue #9 (closed), opens importexport in a new tab in Firefox
- Fix #10 (closed) : upgrade jQuery to latest version 3.x and fix all breaking changes (fixes bug next chapter even if none and keys handling)
- Fix #8 (closed) : inject scripts through browser.tabs.onUpdated.addListener instead of having a content script in every pages
- Fix #7 (closed) : use viewport width instead of screen width to resize scans
- Fix issues in bookmarking on certain url patterns