Use 100% of screen width for results on smaller screens

- Ellipsis used and text truncated if name overflows
- Icon column does not expand out as screen gets wider

Refs #228

demo-shell-ng2/app/components/search/search.component.ts

@@ -37,9 +37,15 @@ declare let __moduleName: string;
             cursor: pointer;
         }
         @media screen and (max-width: 600px) {
+            :host .col-display-name {
+                min-width: 100px;
+            }
             :host .col-modified-at, :host .col-modified-by {
                 display: none;
             }
+            :host div.search-results-container table {
+                width: 100%;
+            }
         }
     `],
     directives: [ ALFRESCO_SEARCH_DIRECTIVES, VIEWERCOMPONENT ]