Fix image loading in OpenSeadragon (#899)

* Fix image loading in OpenSeadragon

* chore: bump version to 4.2.19-20260318 [version bump]

* Fix bug

* Bump version

* Bump version

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: ac-61

configure/package.json

@@ -1,6 +1,6 @@
 {
   "name": "configure",
-  "version": "4.2.27-20260319",
+  "version": "4.2.28-20260319",
   "homepage": "./configure/build",
   "private": true,
   "dependencies": {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "mmgis",
-  "version": "4.2.27-20260319",
+  "version": "4.2.28-20260319",
   "description": "A web-based mapping and localization solution for science operation on planetary missions.",
   "homepage": "build",
   "repository": {

src/essence/Basics/UserInterface_/UserInterfaceDefault_.js

@@ -1672,6 +1672,8 @@ function windowresize() {
     })
     //The viewer slider
     UserInterface.viewerSplit.css('height', UserInterface.mainHeight + 'px')
+    //resize viewer
+    if (Viewer_ != null) Viewer_.invalidateSize()
 
     //The map screen
     UserInterface.mapScreen.css({

src/essence/Basics/Viewer_/Viewer_.js

@@ -191,7 +191,6 @@ var Viewer_ = {
         this.imageViewerMap = OpenSeadragon({
             id: 'imageViewerMap',
             //prefixUrl: 'scripts/external/OpenSeadragon/images/',
-            defaultZoomLevel: 0.5,
             //showNavigationControl: false,
             showFullPageControl: false,
             zoomInButton: 'osd-zoomin',
@@ -565,6 +564,15 @@ var Viewer_ = {
             this.calculateBounds()
             this.imageViewerMap.setMaxBounds(this.bounds)
         }
+        if (this.imageViewer != null) {
+            // Wait a bit for the viewer panel to be visible before updating the image viewer
+            setTimeout(function () {
+                Viewer_.imageViewerMap.viewport.fitBounds(
+                    Viewer_.imageViewerMap.viewport.getHomeBounds(),
+                    true
+                )
+            }, 10)
+        }
     },
     getLastImageId() {
         return Viewer_.lastImageId == null ? false : Viewer_.lastImageId