Fixes:

- Top bar uses flex until it's wide enough, then grid
- Fix button active style when top bar has colour

src/renderer/components/top-nav/top-nav.sass

@@ -13,17 +13,17 @@
   line-height: 60px
   background-color: var(--card-bg-color)
   -webkit-box-shadow: 0px 2px 1px 0px var(--primary-shadow-color)
-  display: grid
-  grid-template-columns: 1fr auto 1fr
+  display: flex
   align-items: center
+  align-content: center
+
+  @media only screen and (min-width: 901px)
+    display: grid
+    grid-template-columns: 1fr 440px 1fr
 
   @include top-nav-is-colored
     background-color: var(--primary-color)
 
-.menuIcon // the hamburger menu button
-  @include top-nav-is-colored
-    background-color: var(--primary-color-active)
-
   @media only screen and (max-width: 680px)
     display: none
 
@@ -51,6 +51,9 @@
     background-color: var(--tertiary-text-color)
     transition: background 0.2s ease-in
 
+    @include top-nav-is-colored
+      background-color: var(--primary-color-active)
+
 .side // parts of the top nav either side of the search bar
   display: flex
   align-items: center
@@ -93,6 +96,9 @@
         background-image: var(--logo-text-bar-color)
 
 .middle // the middle part of the top nav which contains the search bar
+  max-width: 440px
+  flex: 1
+
   .searchContainer
     display: flex
     align-items: center
@@ -105,9 +111,6 @@
       background-color: var(--side-nav-color)
 
     .searchInput
-      width: 420px
-
-      @media only screen and (max-width: 680px)
       flex: 1
 
   .searchFilters