change notebook icon in toolbar and search result (#1252)

see f6f0bcf1c3

ElectronClient/app/gui/MainScreen.jsx

@@ -394,7 +394,7 @@ class MainScreenComponent extends React.Component {
 
 		headerItems.push({
 			title: _('New notebook'),
-			iconName: 'fa-folder-o',
+			iconName: 'fa-book',
 			onClick: () => { this.doCommand({ name: 'newNotebook' }) },
 		});
 

ElectronClient/app/gui/NoteText.jsx

@@ -1373,7 +1373,7 @@ class NoteTextComponent extends React.Component {
 		if (note && this.state.folder && ['Search', 'Tag'].includes(this.props.notesParentType)) {
 			toolbarItems.push({
 				title: _('In: %s', this.state.folder.title),
-				iconName: 'fa-folder-o',
+				iconName: 'fa-book',
 				enabled: false,
 			});
 		}