Tweak WorldBoundaryShape icon

editor/icons/WorldBoundaryShape2D.svg

@@ -1 +1 @@
-<svg height="16" viewBox="0 0 16 16" width="16" xmlns="http://www.w3.org/2000/svg"><g stroke="#5fb2ff" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" transform="translate(0 -1036.4)"><path d="m1 1037.4 14 14" fill="#5fb2ff" fill-rule="evenodd" stroke-opacity=".39216"/><g fill="none"><path d="m3 1039.4 10 10" stroke-opacity=".58824"/><path d="m5 1041.4 6 6"/></g></g></svg>
+<svg height="16" viewBox="0 0 16 16" width="16" xmlns="http://www.w3.org/2000/svg"><g stroke="#5fb2ff" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" fill="none"><path d="M1 11h14"/><path d="M8 10V1.75l2 2m-2-2-2 2" stroke-width="1.5"/></g><path d="M0 11h16v5H0z" fill="#5fb2ff" fill-opacity=".392"/></svg>

editor/icons/WorldBoundaryShape3D.svg

@@ -1 +1 @@
-<svg height="16" viewBox="0 0 16 16" width="16" xmlns="http://www.w3.org/2000/svg"><path d="m1 1044.4 7 3 7-3-7-3z" fill="#a2d2ff" fill-rule="evenodd" transform="translate(0 -1036.4)"/></svg>
+<svg height="16" viewBox="0 0 16 16" width="16" xmlns="http://www.w3.org/2000/svg"><path d="M0 10h16v6H0z" fill="#5fb2ff" fill-opacity=".392"/><path d="m0 10 8 2.5 8-2.5-8-2.5z" fill="#5fb2ff"/><path d="M8 1 5.5 3.5a2.5 1 0 0 0 1.5.9v5.2a1 .4 0 0 0 1 .4z" fill="#a2d2ff"/><path d="m8 1 2.5 2.5a2.5 1 0 0 1-1.5.9v5.2a1 .4 0 0 1-1 .4V5.25a2.5 1 0 0 1-1-.1V4.4a2.5 1 0 0 0 1 .1z" fill="#2998ff"/></svg>