Chrome issues - opening files from the context menu in FIles, and two loading icons that shouldn't be visible

Hi! Gotta say, great work on this! Thank you.

I'm travelling to Japan (from Australia) very soon and will use this to track my travels with daily .gpx uploads.

I was really excited by some of your recent work in the master of the repository - adding support for opening a GPX from the Files area. It makes it so much easier for less technical people to access the files.

Unfortunately I'm hitting a couple of bugs in Chrome - Firefox works fine.

See the screen shot below the list for an example.

Bugs in Chrome:

• Loading .gpx files via the context menu in the Files app doesn't work - could to be an escaping issue? There are no errors on the console, but an alert pops up saying 'The file does not exist or it is not a gpx.'. The address it's trying to load is: /Tracking Gerry/20170319.gpx. As you see in the screen shot below, it's displaying as %2FTracking Gerry%2F20170319.gpx. In FireFox it displays the gpx correctly when opened from the context menu in Files.
• There are two loading icons that are displayed under the 'clear map' button. One for 'exporting file to gpx ' and one for 'saving file ( %)'. Again, in Firefox, these are not present.