Restore circular "unlimited" vision for grid sights

Grid shapes are not nearly performant enough yet to support this case.

The special `range == 0` case is now documented, and the `GridlessGrid.getGridArea()` override relies on it now instead
of duplicating the case.

Author: kwvanderlinde

src/main/java/net/rptools/maptool/model/Grid.java

@@ -537,10 +537,7 @@ protected int getTokenFacingAngleRelativeToGridAxis(Token token) {
       double arcAngle,
       int offsetAngle,
       boolean scaleWithToken) {
-    if (range == 0) {
-      range = zone.getTokenVisionDistance();
-    }
-    double visionRange = range * getSize() / zone.getUnitsPerCell();
+    double visionRange = ((range == 0) ? zone.getTokenVisionDistance() : range) * getSize() / zone.getUnitsPerCell();
 
     Rectangle footprint = token.getFootprint(this).getBounds(this);
 
@@ -852,7 +849,8 @@ private void oneThird(Rectangle regionToDivide, int column, int row, Rectangle d
    * Returns an Area with a given radius that is shaped and aligned to the current grid
    *
    * @param token token which to center the grid area on
-   * @param range range in units grid area extends out to
+   * @param range range in units grid area extends out to. if set to {@code 0}, the result will be a
+   *     circular area extending out to {@code visionRange}.
    * @param scaleWithToken whether grid area should expand by the size of the token
    * @param visionRange token's vision in pixels
    * @return the {@link Area} conforming to the current grid layout

src/main/java/net/rptools/maptool/model/GridlessGrid.java

@@ -29,7 +29,6 @@
 import net.rptools.maptool.client.walker.WalkerMetric;
 import net.rptools.maptool.server.proto.GridDto;
 import net.rptools.maptool.server.proto.GridlessGridDto;
-import net.rptools.maptool.util.GraphicsUtil;
 
 public class GridlessGrid extends Grid {
   private static List<TokenFootprint> footprintList;
@@ -198,8 +197,7 @@ public Point2D.Double getCenterOffset() {
   protected Area getGridArea(
       Token token, double range, boolean scaleWithToken, double visionRange) {
     // A grid area isn't well-defined when there is no grid, so fall back to a circle.
-    return GraphicsUtil.createLineSegmentEllipse(
-        -visionRange, -visionRange, visionRange, visionRange, CIRCLE_SEGMENTS);
+    return super.getGridArea(token, 0, scaleWithToken, visionRange);
   }
 
   @Override