first mobile style rules, hide extra columns in files view and scroll header

apps/files_sharing/css/mobile.css

@@ -0,0 +1,18 @@
+@media only screen and (max-width: 600px) {
+
+/* make header and controls bar scroll up for more view of content on small screens */
+#header,
+#controls {
+	position: absolute;
+}
+
+/* hide size and date columns */
+table th#headerSize,
+table td.filesize,
+table th#headerDate,
+table td.date {
+	display: none;
+}
+
+
+}

apps/files_sharing/public.php

@@ -136,6 +136,7 @@ if (isset($path)) {
 	} else {
 		OCP\Util::addScript('files', 'file-upload');
 		OCP\Util::addStyle('files_sharing', 'public');
+		OCP\Util::addStyle('files_sharing', 'mobile');
 		OCP\Util::addScript('files_sharing', 'public');
 		OCP\Util::addScript('files', 'fileactions');
 		OCP\Util::addScript('files', 'jquery.iframe-transport');