UI Overhaul

[ChrisonSimtian]

• have the settings (and any other screens) as its own window, not inside the map window
• remove size limitations for minimap window so that players can resize it however they want (maybe have a 50px x 50px minimum?)
• remove header to keep minimap as clean as possible (instead have icons besides the map to open settings etc.)
• give minimap a border (on off) to make it look a bit cleaner