[Feature Request] Allow/enable resizing

[Swizeve]

Currently once your Brisk menu reaches a certain number of categories it puts a large scroll bar in the middle of your menu rather than auto resizing or allowing the user to increase the size:

https://ubuntu-mate.community/uploads/default/optimized/2X/6/6a6b1ee7e71215d1d59d049196c9c36aa0419d8e_1_392x500.png

This is unfortunately rather ugly and could be better handled by allowing the user to increase the height of the menu to suit their needs. This feature request is to provide an option or functionality to fully display the categories on the menu by allowing or enabling the ability to resize the menu.