fix tipsy dependency

apps/files/js/files.js

@@ -61,7 +61,7 @@
 			if (response.data !== undefined && response.data.uploadMaxFilesize !== undefined) {
 				$('#max_upload').val(response.data.uploadMaxFilesize);
 				$('#free_space').val(response.data.freeSpace);
-				$('#upload.button').attr('original-title', response.data.maxHumanFilesize);
+				$('#upload.button').attr('data-original-title', response.data.maxHumanFilesize);
 				$('#usedSpacePercent').val(response.data.usedSpacePercent);
 				$('#owner').val(response.data.owner);
 				$('#ownerDisplayName').val(response.data.ownerDisplayName);
@@ -72,7 +72,7 @@
 			}
 			if (response[0].uploadMaxFilesize !== undefined) {
 				$('#max_upload').val(response[0].uploadMaxFilesize);
-				$('#upload.button').attr('original-title', response[0].maxHumanFilesize);
+				$('#upload.button').attr('data-original-title', response[0].maxHumanFilesize);
 				$('#usedSpacePercent').val(response[0].usedSpacePercent);
 				Files.displayStorageWarnings();
 			}