HTML tree: Add alternating rows to all trees except collections on macOS

chrome/content/zotero/collectionTree.jsx

@@ -375,6 +375,7 @@ var CollectionTree = class CollectionTree extends LibraryTree {
 				renderItem: this.renderItem,
 				// Extra space on macOS (which gets reduced by 2, so this really means 20)
 				...(Zotero.isMac && { rowHeight: 22 }),
+				alternatingRowColors: null,
 
 				onSelectionChange: this._handleSelectionChange,
 				isSelectable: this.isSelectable,

chrome/content/zotero/components/virtualized-table.jsx

@@ -331,6 +331,7 @@ class VirtualizedTable extends React.Component {
 		getColumnPrefs: () => ({}),
 		storeColumnPrefs: noop,
 		staticColumns: false,
+		alternatingRowColors: Zotero.isMac ? ['-moz-OddTreeRow', '-moz-EvenTreeRow'] : null,
 
 		// Render with display: none
 		hide: false,

chrome/content/zotero/itemTree.jsx

@@ -1130,7 +1130,6 @@ var ItemTree = class ItemTree extends LibraryTree {
 					hide: showMessage,
 					key: "virtualized-table",
 					label: Zotero.getString('pane.items.title'),
-					alternatingRowColors: Zotero.isMac ? ['-moz-OddTreeRow', '-moz-EvenTreeRow'] : null,
 
 					showHeader: true,
 					columns: this._getColumns(),