Toggle sidebar button more obvious

The toggle is now at the top of the sidebar because it is not noticeable
near the bottom. By placing it at the top, users will immediately know that
they can have more space if they desire versus on the bottom, they will have
to search for it and that's not desired.

Fixes #2044

app/assets/stylesheets/sections/nav_sidebar.scss

@@ -108,7 +108,7 @@
     width: $sidebar_width;
 
     .nav-sidebar {
-      margin-top: 20px;
+      margin-top: 29px;
       position: fixed;
       top: 45px;
       width: $sidebar_width;
@@ -127,7 +127,7 @@
     width: 52px;
 
     .nav-sidebar {
-      margin-top: 20px;
+      margin-top: 29px;
       position: fixed;
       top: 45px;
       width: 52px;
@@ -144,14 +144,22 @@
         }
       }
     }
+
+    .collapse-nav a {
+      left: 0px;
+      padding: 5px 23px 3px 22px;
+    }
   }
 }
 
 .collapse-nav a {
   position: fixed;
-  bottom: 15px;
-  padding: 10px;
-  background: #DDD;
+  top: 47px;
+  padding: 5px 13px 3px 13px;
+  left: 197px;
+  background: #EEE;
+  color: black;
+  border: 1px solid rgba(0,0,0,0.035);
 }
 
 @media (max-width: $screen-md-max) {

app/views/layouts/_collapse_button.html.haml

 - if nav_menu_collapsed?
-  = link_to icon('angle-right'), '#', class: 'toggle-nav-collapse'
+  = link_to icon('angle-right'), '#', class: 'toggle-nav-collapse', title: "Open/Close"
 - else
-  = link_to icon('angle-left'), '#', class: 'toggle-nav-collapse'
+  = link_to icon('angle-left'), '#', class: 'toggle-nav-collapse', title: "Open/Close"