fix(StatusIcon): flag/currency icons are rendered blurred

- set the Image's sourceSize only if it's an SVG, otherwise it is
rendered blurry
- remove antialiasing/mipmap; it's not the correct fix, doesn't really
improve the visual quality for smallish items like icons and just causes
memory/GPU overhead

src/StatusQ/Core/StatusIcon.qml

@@ -8,23 +8,19 @@ Image {
     id: statusIcon
     width: 24
     height: 24
-    sourceSize.width: width
-    sourceSize.height: height
+    // SVGs must have sourceSize, PNGs not; otherwise blurry
+    sourceSize: !!icon ? Qt.size(width, height) : undefined
     fillMode: Image.PreserveAspectFit
 
-    antialiasing: true
-    mipmap: true
-
     onIconChanged: {
         if (icon !== "") {
             source = "../../assets/img/icons/" + icon + ".svg";
         }
     }
 
-    layer.mipmap: true
     layer.smooth: true
     layer.format: ShaderEffectSource.RGBA
-    layer.enabled:!Qt.colorEqual(statusIcon.color, "transparent")
+    layer.enabled: !Qt.colorEqual(statusIcon.color, "transparent")
     layer.effect: ColorOverlay {
         color: statusIcon.color
     }