<H1>Test</H1>
To test, one may use the bwidget demo by modifying the following line in demo/manager.tcl:
<verbatim>
--- bwidget-rfe-d5480d1da2/demo/manager.tcl
+++ bwidget-rfe-d5480d1da2/demo/manager_ori.tcl
@@ -76,15 +76,15 @@
             $lb insert end "Value $i"
         }
         $sw setwidget $lb
         pack $sw -fill both -expand yes
     }
 
     set sw [ScrolledWindow $pane3.sw -relief sunken -borderwidth 2]
+    set sf [ScrollableFrame $sw.f -onlyhover 1]
-    set sf [ScrollableFrame $sw.f]
     $sw setwidget $sf
     set subf [$sf getframe]
     set lab [label $subf.lab -text "This is a ScrollableFrame"]
     set chk [checkbutton $subf.chk -text "Constrained width" \
                  -variable DemoManager::_constw \
                  -command  "$sf configure -constrainedwidth \$DemoManager::_constw"]
     pack $lab
</verbatim>
<h1>Active by default</h1>
It is proposed that this option is active by default if themed.
I don't think this is a good idea.

<h1>Documentation</h1>
   *   File documentation always repets the same sentence
   *   User documentation missing

I suppose, I will correct all this in a follow-up commit.