improve ux of patterns input field in findinfiles

package.json

@@ -63,7 +63,7 @@
         "c9.ide.collab": "#7009f69cb0",
         "c9.ide.local": "#2bfd7ff051",
         "c9.ide.find": "#989c06e6a7",
-        "c9.ide.find.infiles": "#f98dfef554",
+        "c9.ide.find.infiles": "#1b83cf12f1",
         "c9.ide.find.replace": "#e4daf722b8",
         "c9.ide.run.debug": "#379e508be6",
         "c9.ide.ace.emmet": "#e5f1a92ac3",

plugins/c9.ide.ui/lib_apf.js

@@ -9016,6 +9016,9 @@ var modules = {
     boxFlex: function(oHtml, value, center) {
         oHtml.style[apf.CSS_FLEX_PROP] = value;
     },
+    boxFlexGrow: function(oHtml, value, center) {
+        oHtml.style[apf.CSS_FLEX_PROP + "-grow"] = value;
+    },
     "height-rsz": function(oHtml, value, center) {
         oHtml.style.height = value + PX;
         if (apf.hasSingleResizeEvent && apf.layout.$onresize)