fix(soba/gizmos): use boolean coercion

Author: nartc

libs/soba/gizmos/src/lib/gizmo-helper/gizmo-viewcube.ts

@@ -169,7 +169,7 @@ export class FaceCube {
 			(pointerover)="$any($event).stopPropagation(); hover.set(true)"
 			(click)="internalOnClick($any($event))"
 		>
-			<ngt-mesh-basic-material [transparent]="true" [opacity]="0.6" [color]="color()" [visible]="hover()" />
+			<ngt-mesh-basic-material transparent [opacity]="0.6" [color]="color()" [visible]="hover()" />
 			<ngt-box-geometry *args="dimensions()" />
 		</ngt-mesh>
 	`,

libs/soba/gizmos/src/lib/pivot-controls/scaling-sphere.ts

@@ -77,11 +77,11 @@ const scaleMatrix = new THREE.Matrix4();
 				>
 					<ngt-sphere-geometry *args="[radius(), 12, 12]" />
 					<ngt-mesh-basic-material
-						[transparent]="true"
+						transparent
 						[depthTest]="pivotControls.depthTest()"
 						[color]="color()"
 						[opacity]="pivotControls.opacity()"
-						[polygonOffset]="true"
+						polygonOffset
 						[polygonOffsetFactor]="-10"
 					/>
 				</ngt-mesh>