feature(header): Issue#106 - add a logout button

src/header.pug

@@ -22,7 +22,7 @@ details#user-controls
   #user-controls__panel
     include page-user-panel.pug
 
-button#login(onclick="document.querySelector('sib-auth').login();") login
+button(role='log in' onclick="document.querySelector('sib-auth').login();") Login
 
 
 sib-auth

src/page-user-panel.pug

@@ -10,5 +10,4 @@ nav(role="user's functionalities menu")
       sib-route(name='')
         li
           a Admin
-    sib-route
-      button(role='log out') Log out
+    button(role='log out' onclick="document.querySelector('sib-auth').logout();") Log out

src/styles/header.scss

@@ -194,7 +194,9 @@ details#user-controls {
 
       button {
         color: $color-text-base;
-        margin: 1.6rem 1.3rem;
+        padding: 1.6rem 1.3rem;
+        text-align: left;
+        width: 100%;
       }
     }
   }

src/styles/main.scss

@@ -4,10 +4,8 @@
   display: none !important;
 }
 
-*,
-*::after,
-*::before {
-  //  box-sizing: inherit;
+* {
+  box-sizing: border-box;
 }
 
 :root {
@@ -16,7 +14,6 @@
   --sib-notifications-theme: #{$color-46-100-50};
   
   body {
-    //box-sizing: border-box;
     background-color: $color-anti-flash-white;
     color: $color-text-base;
     font-size: 1.6rem;