drop down menus // keyboard shortcuts and display

[Avishayhz]

some drop down menus have many option aka the waves selection for a wave oscillator. there is currently no effect from the scroll by the mouse or the possibility to use up and down arrows after the select is closed. this makes this harder to find the right wave of to scroll different waves while trying new sounds.

i want to be able to use the up and down keyboard arrow to scroll the wave shapes after the menu is closed.
i want the waves menu to show all wave form when open without the need to scroll down for the hidden waves not shown on the list.

its important to make this available also to the other drop down menus for example the LFO waveforms, on up arrow or down the selection must be changed, and the wave would be applied