selected labels functionality
keyboard handlers
vbox min and max implemented
button bar moved to bottom
mouse over functionality for keyboard control
mouse over on keyboard enhancement
active grid indicator
keyboard shortcut for moving active grid
keyboard shortcut for moving active grid
keyboard arrows for moving selected cell when there is no selected cell
inital active grid index indication
zooming in / out bug fixed, moving vbox when scrolled at max
max zoom on zoomSlide
View presets for viewing signals
tooltips on buttons
minor tweaks