Otherwise the minimum size is 1×1.
modelbutton.flat arrow {
background: none;
+ min-width: 16px;
+ min-height: 16px;
&:hover { background: none; }
modelbutton.flat:hover, .menuitem.button.flat:hover { background-color: #3f4649; }
-modelbutton.flat arrow { background: none; }
+modelbutton.flat arrow { background: none; min-width: 16px; min-height: 16px; }
modelbutton.flat arrow:hover { background: none; }
modelbutton.flat:hover, .menuitem.button.flat:hover { background-color: #f4f4f4; }
-modelbutton.flat arrow { background: none; }
+modelbutton.flat arrow { background: none; min-width: 16px; min-height: 16px; }
modelbutton.flat arrow:hover { background: none; }