Rethink of dropDownComponent

[jameswilddev]

At present, dropDownComponent has a button which is overlaid with a modal to show the drop-down section.

This causes some graphical glitching as the modification of the button to alter its border radius and the addition of the modal don't happen simultaneously. Additionally, the height changes slightly, pushing elements down the page. Can this be fixed by completely obscuring the button with the modal?