Update status bar when image is reloaded

[TimvdLippe]

Requirements

• Filling out the template is required. Any pull request that does not include enough information to be reviewed in a timely manner may be closed at the maintainers' discretion.
• All new code requires tests to ensure against regressions

Description of the Change

When an image is reloaded from disc, it assigns a new value to src with the current date, listens again for the on-load after the fact, to then fire an update. The status bar thus listens to this update and calculates the sizes again.

Alternate Designs

I am not aware of a different method to achieve this

Benefits

The status bar is updated again

Possible Drawbacks

I could not write a test for this. First of all, when I would copy displays the size of the image as is in the spec, it would throw TypeError: Cannot read property 'textContent' of null. For some reason there is state left over after the beforeEach, but I could not track down why.

Applicable Issues

Fixes #105