Monaco editor refactoring (#4225)

* monaco editor refactoring

Signed-off-by: Roman <ixrock@gmail.com>

* clean up / responding to comments

Signed-off-by: Roman <ixrock@gmail.com>

* move custom monaco themes to own folder

Signed-off-by: Roman <ixrock@gmail.com>

* fix lint

Signed-off-by: Roman <ixrock@gmail.com>

* removed unused rules from webpack's config (renderer)

Signed-off-by: Roman <ixrock@gmail.com>

src/renderer/components/dock/dock.scss

@@ -81,7 +81,7 @@
     background: $terminalBackground;
     flex: 1;
     overflow: hidden;
-    transition: flex 60ms ease-in-out;
+    transition: flex-basis 25ms ease-in;
 
     > *:not(.Spinner) {
       position: absolute;
@@ -91,8 +91,4 @@
       bottom: 0;
     }
   }
-
-  .MonacoEditor {
-    border: none;
-  }
 }