QtIFW

Change QBSP button name

In macOS, QBSP button was taking too much space making component tree quite
narrow. Shorten the button name to make more space to tree

Change-Id: I92355c2a7ebe2442bdb6779454f2e6b2c01bb6e7
Reviewed-by: Iikka Eklund <iikka.eklund@qt.io>