add review changes

Author: fanixus96

scaladoc/resources/dotty_res/styles/theme/components/button/icon-button.css

@@ -4,6 +4,8 @@
   cursor: pointer;
   outline: none !important;
   padding: 0;
+  height: 16px;
+  width: 16px;
 }
 
 .icon-button::after {

scaladoc/resources/dotty_res/styles/theme/layout/leftMenu.css

@@ -5,7 +5,7 @@
   padding: calc(3 * var(--base-spacing)) 0px;
   position: absolute;
   width: calc(39 * var(--base-spacing));
-  height: calc(100% - var(--header-height) - (13 * var(--base-spacing)));
+  height: calc(100% - var(--header-height) - (12 * var(--base-spacing)));
   left: 0px;
   top: calc(8 * var(--base-spacing));
   background: var(--background-default);