move definer section out of tab panel; restrict minimum size of tab panel

clicket.rkt

@@ -72,10 +72,12 @@
                       (clicker "coder"      150   5   0)
                       (clicker "paren farm" 1000  10  0)))
 (for ([cl all-clickers]) (new-buy-button builtins cl))
+; prevent tab panel from resizing to a panel with arrows
+(send right-side min-width (send right-side get-width))
 
 ; define your own clickers
 (define definer-panel (new group-box-panel%
-                           [parent definitions]
+                           [parent left-side]
                            [label "Define custom clicker"]))
 (define name-field (new text-field%
                         [parent definer-panel]