Add extra nav for settings & clean header buttons

config/locales/en.yml

@@ -193,14 +193,19 @@ en:
       notice: Contest updated
       title: Edit contest settings
     form:
-      categories: Participant categories
-      general: General parameters
-      offline: Offline participation
       offline_single_puzzle_warning: This is not available for contests with more than one puzzle
     index:
       title: Welcome %{username}!
       manage_contests: Manage my contests
       new_contest: Create a new contest
+    nav:
+      categories: Participant categories
+      categories_description: Once you add categories, you will be able to assign them to participants on their profiles, and a filter for categories will be available on the public scoreboard
+      general: General
+      online: Online contests
+      onsite: Onsite contests
+      public: Public scoreboard
+      settings: Settings
     new:
       notice: Contest added
       title: New jigsaw puzzle contest
@@ -287,10 +292,11 @@ en:
     rank: Rank
   lib:
     ranking:
-      actual: First by number of pieces assembled, then by time
+      actual: First by number of pieces assembled, then by time (recommended if unsure)
       theorical: By time only (projected time calculated with the ppm count)
   messages:
     index:
+      info: This section is only used for contests that rely on the connection with Google Meet
       no_messages: No messages received yet
     convert:
       title: New completion