Klipper: Remove local Configure Klipper action
This action would cause the shortcuts configuration menu to show both local and global shortcuts, which makes no sense due to Klipper being a globally accessed application.
This action is only used in cases where Klipper will be it's own application with a normal window, similar to applications like Dolphin, Kate, etc.. But Klipper is never used this way.
Currently only place where you can use this action is the configuration menu itself, where it does nothing, since the menu is already open.
So let's just remove it. This also makes sure users do not accidentally select "Shortcut/Alternate" instead of "Global Shortcut/Alternate" for their shortcuts. See the related bug for context.
BUG: 501632 FIXED-IN: 6.4.1