Fixed loading screen when click on miniature.

examples/imageviewer/common/src/desktopMain/kotlin/example/imageviewer/model/ContentState.kt

@@ -228,6 +228,7 @@ object ContentState {
                     val fullSizePicture = loadFullImage(picture.source)
                     fullSizePicture.id = picture.id
                     wrapPictureIntoMainImage(fullSizePicture)
+                    isAppUIReady.value = true
                 }
             } else {
                 invokeLater {
@@ -235,6 +236,7 @@ object ContentState {
                         "${ResString.noInternet}\n${ResString.loadImageUnavailable}"
                     )
                     wrapPictureIntoMainImage(picture)
+                    isAppUIReady.value = true
                 }
             }
         }

examples/imageviewer/common/src/desktopMain/kotlin/example/imageviewer/view/MainScreen.kt

@@ -145,7 +145,8 @@ fun setTitleBar(text: String, content: ContentState) {
                         onExit = {
                             refreshButtonHover.value = false
                             false
-                    })
+                        }
+                    )
                     .background(color = if (refreshButtonHover.value) TranslucentBlack else Transparent),
                     onClick = {
                         if (content.isContentReady()) {
@@ -169,7 +170,8 @@ fun setPreviewImageUI(content: ContentState) {
         modifier = Modifier.background(color = DarkGray),
         onClick = {
             AppState.screenState(ScreenType.FullscreenImage)
-    }) {
+        }
+    ) {
         Card(
             backgroundColor = Transparent,
             modifier = Modifier.preferredHeight(250.dp),