Profile Images don't load on wallet

[tobias-g1]

Describe the bug
When viewing a users profile on the profile page, the profile image doesn't display correctly.

To Reproduce
Steps to reproduce the behavior:

1. Go to your wallet.
2. Note that the profile image doesn't load.

I suspect this isn't happening to every user, this may not be able to replicate.

Expected behaviour
A user's profile image should always be displayed correctly.

Screenshots
The following screenshot provides additional clarity surrounding the issue:

Browser: Google Chrome (Version 71.0.3578.98 (Official Build) (64-bit))
Device: MacBook Pro (Retina, 15-inch, Late 2013)
Operating system: MacOS Mojave Version 10.14.1 (18B75)

A simple a more flexible solution would replace:

this.profile_url = this.profile && this.profile.profile ? this.profile.profile.profile_image : '';

so that the profile image is no longer pulled from the json_metadata, this prevents a number of issues that can pop up surrounding profile images not being loaded correctly. If you instead use:

https://steemitimages.com/u/${username}/avatar

This would also handle broken images with a fallback.

[nirvanaitsolutions]

@bunyy I'll fix this.

[nirvanaitsolutions]

@bunyy canyou fix it asap?