Add "Size" column to Image Table

In the class ImagesTable in "project/images/images/tables.py"
was added the size column after disk_format column.

Used the exist filesizeformat filter for format the value and verbose name.

Closes-Bug: #1300622
Change-Id: I047732bc0295ea50d7ddd88745320c0946471d7c
Merge "Add "Size" column to Image Table"