fix navbar dark mode transition

frontend/src/Documents/Docs.scss

@@ -76,6 +76,8 @@
     margin-bottom: 1rem;
 
     .documentHeader {
+        transition: 0.3s;
+
         display: flex;
         align-content: baseline;
 
@@ -218,6 +220,8 @@
     }
 
     .documentHeader {
+        transition: 0.3s;
+
         input {
             transition: 0.3s;
             background: $dark-gray4;

frontend/src/Home/Home.scss

@@ -23,6 +23,10 @@
 
     .bp3-navbar {
         transition: 0.3s;
+
+        * {
+            transition: 0.3s;
+        }
     }
 
     #uploadingStatusButton {
@@ -41,4 +45,4 @@
     .bp3-navbar {
         transition: 0.3s;
     }
-}
+}