fix: snap to grid for angle-aligned lines

OpenBoard-org / OpenBoard

OpenBoard is a cross-platform interactive whiteboard application intended for use in a classroom setting.

https://openboard.ch/

GNU General Public License v3.0

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Closed letsfindaway closed 3 days ago

letsfindaway commented 1 week ago

snap-to-grid did not work for lines that also fulfill the snap-to-angle criterion
check and compare the snap points for both criteria
if they result in the same line angle, then the snap-to-grid criterion is preferred