sticky header bug (#403)

.gitignore

@@ -8,4 +8,6 @@ _site/
 *.tmp
 /lib
 /.jekyll-cache
+.vscode/*
+!.vscode/settings.json
 .DS_Store

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+	"editor.formatOnSave": false
+}

_includes/header.html

@@ -1,4 +1,4 @@
-<nav class="navbar navbar-expand-lg fixed-top navbar-dark" id="main-nav">
+<nav class="navbar navbar-expand-lg sticky-top navbar-dark" id="main-nav">
     <a class="navbar-brand" href="/" onclick="gaEvent('Nav Logo')">
         <i class="fa fa-shield"></i>
         <span class="hidden-sm"><strong>bit</strong>warden</span>

_scss/_all.scss

@@ -5,10 +5,6 @@ html {
     -moz-osx-font-smoothing: grayscale;
 }
 
-body {
-    padding-top: $navbar-height;
-}
-
 :target::before {
     content: '';
     display: block;