human-readable file size frontend support

[KWMORALE]

Your checklist for this pull request

• I've read the contributing guideline.
• I've tested my changes by building and running the project, and testing changed functionality (if applicable)
• I've added automated tests for my change (if applicable, optional)
• I've updated documentation to reflect my change (if applicable)

What is the current behaviour?

File sizes are only shown as bytes.

What is the new behaviour?

File sizes are only shown in human-readable form.

Test plan

Check if human-readable file size form match with the original in bytes.

Closing issues

closes #229

[psrok1]

Frontend part looks ok , but search/fields.py needs to be simplified

[psrok1]

Looks ok 👍

[ITAYC0HEN]

Guys please attach screenshots to the PRs, it will be very helpful to easily see the new feature without reading the code :)

[KWMORALE]

For some reason I have missed your comment.
Here you have some screenshots of the new feature.
Mwdb shows size in human-readable form now, but all actions like copy to clipboard or make search from object view is still being executed with original size in bytes. It's prevent conficts with converting size from human-readable form to bytes version.
What is more, the original size in bytes is shown as tooltip when you hover on the size in recent view.

[ITAYC0HEN]

you rock! ♥