Inspector: Replace click.svg with png

Elementa's SVG renderer only works on legacy OpenGL, so this button is
invisible on modern versions.

This commit fixes that by baking the svg to png and using that instead.

Converted using ImageMagick (`convert -density 1200 -resize 48x48
-background none ../../svg/click.svg click.png`) after changing the
stroke color to `white`.

GitHub: #153

src/main/kotlin/gg/essential/elementa/components/inspector/Inspector.kt

@@ -82,11 +82,13 @@ class Inspector @JvmOverloads constructor(
             height = 14.pixels()
         } childOf titleBlock
 
-        SVGComponent.ofResource("/svg/click.svg").constrain {
+        UIImage.ofResourceCached("/textures/inspector/click.png").constrain {
             x = SiblingConstraint(10f)
             y = CenterConstraint()
             width = AspectConstraint(1f)
-            height = RelativeConstraint(1f).to(title) as HeightConstraint
+            height = 12.pixels
+        }.apply {
+            textureMinFilter = UIImage.TextureScalingMode.LINEAR
         }.onMouseClick { event ->
             event.stopPropagation()
             isClickSelecting = true