GParted is slow refreshing NTFS file systems

Title was: Disk Select Dialog before App starts

#Enhancement

The loading times for the App and after Partition changes are long when every partition from every device is read in if I have many Devices and Partitions. I propose to add a Disk Select Dialog before the App starts, where we could select with which Device we want to work or if we want to work with all Devices. I know when i mention the Disk I want to work with in the bash command like "sudo gparted /dev/sda" the load times are much faster if I have many Disks. It would be convenient for me and for the average User who starts Gparted from the App Menu, to have that advantage in loading time too.