Fixing guidebook not resizable from left and right

[PROG-MohamedDwidar]

issue 34504 in space-wizards/space-station-14 needs this fix

It happens that the value DragMode.Move prevents the switch case from catching left and right because the code in ss14 looks like this

var mode = DragMode.Move; ##note that removing this line from ss14 will leave the window unmovable##

if (Resizable)
{
    if (relativeMousePos.Y < DRAG_MARGIN_SIZE)
    {
        mode = DragMode.Top;
    }
    else if (relativeMousePos.Y > Size.Y - DRAG_MARGIN_SIZE)
    {
        mode = DragMode.Bottom;
    }

    if (relativeMousePos.X < DRAG_MARGIN_SIZE)
    {
        mode |= DragMode.Left;
    }
    else if (relativeMousePos.X > Size.X - DRAG_MARGIN_SIZE)
    {
        mode |= DragMode.Right;
    }
}

return mode;

so basically the equal sign removes the Move value in every other case leaving the guidebook window cursor not changing on left and right and here is a video of working solution

https://drive.google.com/file/d/1UTgJGoV_96P2-TyJa1No1gHP9FXIL7Kd/view?usp=sharing

and i also fixed the corresponding code on ss14 repo and will make another pull request there

[lzk228]

i also discovered that silicon laws menu also couldn't be resized on sides
can you add it to this pr so i shouldn't create a new issue?

[lzk228]

oh wait, this change should apply to all windows, sorry