Changes for idea in #1150 (isSmall not active yet)

dev/Styles/Main.less

@@ -4,6 +4,13 @@ html.list-loading body {
 	cursor: progress;
 }
 
+.toggleLeft::before {
+	content: '❮';
+}
+html.rl-left-panel-disabled .toggleLeft::before {
+	content: '❯';
+}
+
 @media screen and (min-width: @maxMobileWidth + 1px) {
 	#rl-app {
 		background-image: var(--main-bg-image);

dev/Styles/User/Layout.less

@@ -15,6 +15,7 @@
 
 	.b-toolbar {
 		padding: 10px 0 10px @rlLowMargin;
+		white-space: nowrap;
 	}
 }
 
@@ -189,7 +190,7 @@ html.rl-left-panel-disabled {
 
 /* desktop */
 @media screen and (min-width: @maxMobileWidth + 1px) {
-	.toggleLeft,
+	#rl-right .toggleLeft,
 	#V-MailMessageList .buttonCompose {
 		display: none !important;
 	}