Ashely That's great I'm glad you thought of it and it was just a bug!
I'm currently on the stable branch, but I will check it out!
newt I know it can be moved, and it's always on the screen for me, the problem is when you select an object you don't see the layout properties anymore, it changes to the object properties, so once you start moving object around you need to return the focus to the layout for changing the grid.
Most of the layout proprieties are not used that often its mostly set it once and forget about it, but the grid, at least for, is used very very often.
And again, I really don't mind the location of the grid control as much as what it takes to get there, if I could press alt+L to quickly show the layout properties, I would be fine with that.