Ability to set fallback image

[sm-g]

I'm submitting a...

[ ] Regression (a behavior that used to work and stopped working in a new release)
[ ] Bug report  
[x ] Feature request
[ ] Documentation issue or request
[ ] Support request

Current behavior

When ModalImage.img or PlainImage.img points to url, returning 404, the default browser fallback image shown in place of PlainImage and still loading spinner in place of ModalImage.

Expected behavior

Ability to set fallback image, i.e. to configure onerror of <img>:

onerror="this.src='error.jpg';this.onerror='';"

Environment

- @ks89/angular-modal-gallery version: 7.2.1
- Operating System and version:  Windows
- I'm using Server Side Rendering with angular-universal: NO
- I'm compiling with mode: DEBUG



Browser:
- [ x] Any

[Ks89]

Interesting idea.

[Ks89]

Feature implemented and scheduled for angular-modal-gallery 8.0.0-beta.1 that is coming soon.
I pushed all commits into branch 800.

I'm sorry for the big delay, but version 8, required a huge effort.

Issue closed.