SOCBoardPanel: Refactor: New method tryMoveShipToHilight to complete ship move on mouse click
SOCBoardPanel: Add Move ship/Cancel move to right-click menu
SOCBoardPanel: Print text at cancel move ship; Rename tryMoveShip -> tryMoveShipFromHere
SOCBoardPanel.clearModeAndHilight: Always repaint; javadocs updateHoverTipToMode