(RTM-7607) [Mobile Management] Improve UI responsiveness

When using Mobile POS Management and changing parameters on a small screen the responsiveness of the UI is improved to always show the icons for users. This makes it easier to understand where to press for updating information. 

(RTM-7843) Image is cut in sales board

Images in sales board are shown equal to the space that is set for them in sales board. The image size is adjusted to the space and not cut off, same way as they are presented in sales view.

(RTM-7737) Skipping reason codes

Not all companies use reason codes when giving discounts. If reason codes are not found the dialog for reason codes will be skipped. Instead user will be directly moved to sales view after adding a discount.