This will allow users to select the colour outside of the image to help 

improve visibility. For instance if an image is mostlywhite and the background 

is white it may be difficult tounderstand what the image is. The background 

colour selector menu is present on all image review modes (i.e. single 

revision, "no diff", two-up, difference, split, and onion skin). The 

background colour selector and the image resolution menu have now been moved 

to a line below the caption in the image reviewer in order to better control 

the arrangements of all elements in the header when the screen is adjusted to 

a smaller size.

Manual testing has been done to ensure that the background color of the image 

review page can change to white, black, grey/black checkerboard, or a custom 

colour for all image views (i.e. single revision, "no diff", two-up, difference, 

split, and onion skin). This has been tested on Mozilla Firefox, Safari and 

Google Chrome and the menu appears as intended.