PR #9509 from Remi: Viewer - fix FW update via popup
PR #9509 from Remi: Viewer - fix FW update via popup

(cherry picked from commit cd79c8f798230cbb2e90695d58133b55bdd7c7ca)

IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense