floating-findbar: make findbar-status able to be clipped

Before this change, the status would show fully, so on narrow windows
the input controls and close button would be pushed out of the window.
Now the status text will instead get clipped.

chrome/floating_findbar_on_top.css

@@ -35,9 +35,23 @@ findbar > .findbar-container{
   border-bottom-left-radius: 4px;
 }
 
-.findbar-closebutton{ margin: 0 !important; border-radius: 0 !important; padding: 5px !important; }
+.findbar-find-status{
+  display: -moz-box;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  -moz-box-flex: 1;
+}
+
+.findbar-closebutton{
+  margin: 0 !important;
+  border-radius: 0 !important;
+  padding: 5px !important;
+}
 .findbar-closebutton > image{ padding: 3px }
-.findbar-closebutton:hover > image{ background: var(--toolbarbutton-hover-background) !important; border-radius: 4px }
+.findbar-closebutton:hover > image{
+  background: var(--toolbarbutton-hover-background) !important;
+  border-radius: 4px
+}
 findbar > .findbar-container > hbox{ margin: 0 5px }
 
 findbar::before{