Fix the dark theme layout of Sidebar and NoteList

browser/main/NoteList/NoteList.styl

@@ -26,6 +26,8 @@ $control-height = 30px
   padding 0
   border none
   background-color transparent
+  outline none
+  cursor pointer
   font-size 10px
 
 .control-button
@@ -67,4 +69,8 @@ body[data-theme="dark"]
     color $ui-dark-inactive-text-color
     &:hover
       color $ui-dark-text-color
-
+  
+  .control-button--active
+    color $ui-dark-text-color
+    &:active
+      color $ui-dark-text-color

browser/main/global.styl

@@ -1,6 +1,6 @@
 global-reset()
 
-DEFAULT_FONTS = 'Lato', helvetica, arial, sans-serif
+DEFAULT_FONTS = 'OpenSans', helvetica, arial, sans-serif
 
 html, body
   width 100%
@@ -11,7 +11,7 @@ body
   font-family DEFAULT_FONTS
   color textColor
   font-size fontSize
-  font-weight 400
+  font-weight 200
 
 button, input, select, textarea
   font-family DEFAULT_FONTS