Fix window flashing being eternal

src/main/kotlin/ru/dbotthepony/mc/otm/client/screen/panels/EditablePanel.kt

@@ -334,22 +334,29 @@ open class EditablePanel<out S : Screen> @JvmOverloads constructor(
 		private set
 
 	var isFlashing: Boolean
-		get() = (flashingSince?.seconds ?: Long.MAX_VALUE) <= 1
+		get() {
+			if (flashingSince == null) {
+				return false
+			}
+
+			if (flashingSince!!.millis >= 1200L) {
+				flashingSince = null
+				return false
+			}
+
+			return true
+		}
 		set(value) {
 			if (value) {
 				flashingSince = SystemTime()
+				popup()
 			} else {
 				flashingSince = null
 			}
 		}
 
-	fun flash() {
-		isFlashing = true
-		popup()
-	}
-
 	val isFlashFrame: Boolean
-		get() = flashingSince != null && flashingSince!!.millis % 400L <= 200L
+		get() = isFlashing && flashingSince!!.millis % 400L <= 200L
 
 	val isFlashFrameRecursive: Boolean
 		get() {
@@ -375,7 +382,7 @@ open class EditablePanel<out S : Screen> @JvmOverloads constructor(
 
 		if (blockingWindow != null) {
 			if (doFlash) {
-				blockingWindow.flash()
+				blockingWindow.isFlashing = true
 			}
 
 			return true
@@ -404,7 +411,7 @@ open class EditablePanel<out S : Screen> @JvmOverloads constructor(
 		}
 
 		if (doFlash) {
-			blockingWindow.flash()
+			blockingWindow.isFlashing = true
 		}
 
 		return true
@@ -1566,6 +1573,8 @@ open class EditablePanel<out S : Screen> @JvmOverloads constructor(
 		for (child in Array(visibleChildrenInternal.size) { visibleChildrenInternal[it] }) {
 			child.tick()
 		}
+
+
 	}
 
 	var isRemoved = false