Measurement function to be available in sheet view mode

Use case details: In ZFP, if the user want to display image as a sheet view, the measurement button is disabled. User can’t measure anything in sheet view mode. For example, many user use 2*3 or 3*2 display format for ultrasound images. But in ZFP, because of the measurement button was disabled, they can’t measure anything on sheet view.

Feature/Requirement Details: Please add the feature the user can measure the measurement in sheet view mode.