Fix missing embark/disembark update on colony panel.
Fix windows directory handing, BR#2689.
Fix mountedBrave label.
Fix unit equip actions.
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Fixes for dual monitors: -Freecol starts on the monitor where the mouse cursor is. -Don't always reserve 32 pixels for insets, a secondary monitor can have 0. -Explicitly maximize window if in windowed mode, since that removes the window borders on my KDE setup. -When switching from windowed to fullscreen, go fullscreen on the window's current screen, not on the primary screen.

Internally, the gui class' "GraphicsDevice gd" var has been removed, since it changes as the window is moved between physical screens.
Allow drag between units in Europe.
Clean up QuickActionMenu equipment handling, implementing IR#182 in passing.
Allow partial tool removal as well.
Fix dragging to equip unit.
Add desynchronization check debug mode.
Handle transient path finding failure better.
Proof of concept for off-center rivers.
Add and use unit.isInColony, and associated cleanup.
Fix dropped %.
Update warehouse after equipment drag.
Fix drag of units to outside colony panel.
Explore tiles for init-mode debug units.
Suppress bell production in REF colonies.
Preserve scope in UnitTypeChange serialization, BR#2692.