I have several ExplorerBarPane components within an ExplorerBar component. These panes come in different sizes. For example, one contains just a single ImageHyperlink. Another contains multiple ImageHyperlink components. Using the convenient "Fit Contents" command, these panes are -- as expected -- rendered correctly within the designer with respect to their size. For example, the latter pane is bigger due to the added components.
However, when I run the application, the ExplorerBarPane components all share the same size, as they are all stretched to fill the entire area of the ExplorerBar. Is there a way I can control this? I'd really like the individual panes to retain their respective sizes. What am I doing wrong?