Improve tab init fail handling

app/src/main/java/io/xpipe/app/browser/BrowserAbstractSessionModel.java

@@ -24,6 +24,9 @@ public class BrowserAbstractSessionModel<T extends BrowserSessionTab> {
 
     public void closeAsync(BrowserSessionTab e) {
         ThreadHelper.runAsync(() -> {
+            // This is a bit ugly
+            // If we die on tab init, wait a bit with closing to avoid removal while it is still being inited/added
+            ThreadHelper.sleep(100);
             closeSync(e);
         });
     }

app/src/main/java/io/xpipe/app/browser/file/BrowserFileListComp.java

@@ -156,8 +156,8 @@ public final class BrowserFileListComp extends SimpleComp {
         var os = fileList.getFileSystemModel()
                 .getFileSystem()
                 .getShell()
-                .orElseThrow()
-                .getOsType();
+                .map(shellControl -> shellControl.getOsType())
+                .orElse(null);
         table.widthProperty().subscribe((newValue) -> {
             if (os != OsType.WINDOWS && os != OsType.MACOS) {
                 ownerCol.setVisible(newValue.doubleValue() > 1000);