Fixes #918, Enabling "Show Unfiled Items" or "Show Duplicates" breaks UI

test/content/support.js

@@ -251,6 +251,33 @@ function waitForCallback(cb, interval, timeout) {
 }
 
 
+function clickOnItemsRow(itemsView, row, button = 0) {
+	var x = {};
+	var y = {};
+	var width = {};
+	var height = {};
+	itemsView._treebox.getCoordsForCellItem(
+		row,
+		itemsView._treebox.columns.getNamedColumn('zotero-items-column-title'),
+		'text',
+		x, y, width, height
+	);
+	
+	// Select row to trigger multi-select
+	var tree = itemsView._treebox.treeBody;
+	var rect = tree.getBoundingClientRect();
+	var x = rect.left + x.value;
+	var y = rect.top + y.value;
+	tree.dispatchEvent(new MouseEvent("mousedown", {
+		clientX: x,
+		clientY: y,
+		button,
+		detail: 1
+	}));
+}
+
+
+
 /**
  * Get a default group used by all tests that want one, creating one if necessary
  */