Try fixing automargin behavior when setting display: 'none' for hidden labels

This is a second attempt after 846c0ab in which I tried to restore the previous behavior of calcLabelLevelBbox.
I now think the hidden label should not contribute to the resulting bbox at all, because it's hidden.
This will break baseline tests but should be the correct behavior.

Author: my-tien

src/plots/cartesian/axes.js

@@ -2946,42 +2946,22 @@ function calcLabelLevelBbox(ax, cls, mainLinePositionShift) {
         bottom = -Infinity;
         left = Infinity;
         right = -Infinity;
-        var xAxis = ax._id.charAt(0) === 'x';
         ax._selections[cls].each(function() {
             var thisLabel = selectTickLabel(this);
-            var hidden = thisLabel.style('display') === 'none';
             // Use parent node <g.(x|y)tick>, to make Drawing.bBox
             // retrieve a bbox computed with transform info
             //
             // To improve perf, it would be nice to use `thisLabel.node()`
             // (like in fixLabelOverlaps) instead and use Axes.getPxPosition
             // together with the makeLabelFns outputs and `tickangle`
             // to compute one bbox per (tick value x tick style)
-            if (hidden) {
-                // turn on label display temporarily to calculate its bbox
-                thisLabel.style('display', null);
+            if (thisLabel.style('display') !== 'none') {
+                var bb = Drawing.bBox(thisLabel.node().parentNode);
+                top = Math.min(top, bb.top);
+                bottom = Math.max(bottom, bb.bottom);
+                left = Math.min(left, bb.left);
+                right = Math.max(right, bb.right);
             }
-            var bb = Drawing.bBox(thisLabel.node().parentNode);
-            if (hidden) {
-                selectTickLabel(this).style('display', 'none');
-            }
-            var currentTop = bb.top;
-            var currentBottom = bb.bottom;
-            var currentLeft = bb.left;
-            var currentRight = bb.right;
-            if (hidden) {
-                if (xAxis) {
-                    currentTop = top;
-                    currentBottom = bottom;
-                } else {
-                    currentLeft = left;
-                    currentRight = right;
-                }
-            }
-            top = Math.min(top, currentTop);
-            bottom = Math.max(bottom, currentBottom);
-            left = Math.min(left, currentLeft);
-            right = Math.max(right, currentRight);
         });
     } else {
         var dummyCalc = axes.makeLabelFns(ax, mainLinePositionShift);