fix: code-folding gutter occludes the first indent guide and cursor some times

Author: abose

src/extensions/default/CodeFolding/main.less

@@ -1,4 +1,4 @@
-@font-size: 1.1em;
+@font-size: 1em;
 @color-triangle: #ccc;
 @color-triangle-mouseover: #aaa;
 @color-triangle-collapsed: #999;

src/styles/Extn-CSSColorPreview.less

@@ -22,9 +22,9 @@
 
 /* Multiple colors preview container (this is a div) */
 .ico-multiple-cssColorPreview {
-    border: solid 1px rgba(255, 255, 255, 0.2);
+    border: solid .05em rgba(255, 255, 255, 0.2);
     .dark & {
-        border: solid 1px rgba(0, 0, 0, 0.2);
+        border: solid .05em rgba(0, 0, 0, 0.2);
     }
     position: relative;
     display: inline-block;