Finished targetPreview

Reverted back to react logic instead of scss logic and improved performance by partially showing the preview icon instead of letting it follow the mouse directly.

frontend/src/interfaces.ts

@@ -0,0 +1,10 @@
+export interface TargetPreviewType {
+    newX: number,
+    newY: number,
+    shouldShow: boolean,
+    appearOK: boolean,
+    eventReady: boolean,
+    show: boolean,
+    x: number,
+    y: number
+}