Swap the L-shape when the indent is dragged outwards

When the indent becomes an ‘outdent’, the L-shape needs to be swapped.

This is implemented in the original code in LGroup::scaleLGroup as follows:

		if (fourAboveZero != (msCoords[4] <= msCoords[0])) {
			// swap 0-4&1-3
			int t = maxSegs[4]; maxSegs[4] = maxSegs[0]; maxSegs[0] = t;
			double t2 = msCoords[4]; msCoords[4] = msCoords[0]; msCoords[0] = t2;
			t = maxSegs[1]; maxSegs[1] = maxSegs[3]; maxSegs[3] = t;
			t2 = msCoords[1]; msCoords[1] = msCoords[3]; msCoords[3] = t2;
			for (int i = 0; i < countries.nMaxSegments; i++) invMaxSegs[i] = -1;
			for (int i = 0; i < maxSegs.length; i++) invMaxSegs[maxSegs[i]] = i;
			oneLeftFive = !oneLeftFive;
		}
		if (oneLeftFive != (msCoords[1] <= msCoords[5])) {
			// swap 1-5&2-4
			int t = maxSegs[1]; maxSegs[1] = maxSegs[5]; maxSegs[5] = t;
			double t2 = msCoords[1]; msCoords[1] = msCoords[5]; msCoords[5] = t2;
			t = maxSegs[2]; maxSegs[2] = maxSegs[4]; maxSegs[4] = t;
			t2 = msCoords[2]; msCoords[2] = msCoords[4]; msCoords[4] = t2;
			for (int i = 0; i < countries.nMaxSegments; i++) invMaxSegs[i] = -1;
			for (int i = 0; i < maxSegs.length; i++) invMaxSegs[maxSegs[i]] = i;
			fourAboveZero = !fourAboveZero;
		}

Open questions:

• what do oneLeftFive and fourAboveZero mean exactly?
• why not just compute it every time?