Custom Image Widget

There seems to be no official hooks that effect media widgets. It is possible to access the properties of the widgets in the sidebar using the dynamic_sidebar_params hook in combination the $wp_registered_widgets global widget array. However, there is no image widget property for setting the inline styling of the image.

Therefore the simplest solution to make these two minor changes to the image widget is to use css rules:

... .widgettitle {
    display: none
}
... img {
    height 44px !important;
}

If css rules were not an option then the best solution would be to use output buffering, as descriped in https://stackoverflow.com/questions/1385954/do-wordpress-widget-or-sidebar-hooks-exist