DropDownMenu: Align text properly

[DarkShadow44]

A bigger rework on how drop down menu is drawn:

• Prevents currently selected text "jumping" when opening drop down the first time. It is centered first, and on opening it jumps left.
• Prevents text breaking in weird ways (Unintended line breaks)
• Easier way to draw the currently selected item

Two things to note:

• The white text is due to StyledText: Use getTextColor instead of getColor #52
• Opening the menu upwards was broken already

Before:

After:

[chrombread]

lgtm