[0.9.1] Mobile usability: filter hexagons by tab, collapse activity filters

- Personal/Community/All header tabs now filter the home hexagon nav (default
  All shows the 10; Personal/Community show their 5) via the CSS radio-hack.
  Removed the square-accordion sidebars (.sidebar-left/.sidebar-right) they
  replaced.
- Wrap the dense activity filter strip (RECENT/ALL/MINE/…) in a collapsible
  FILTER dropdown, hidden by default, keeping the hexagons visible above.
- Add the missing English i18n keys (menuCommunity, menuAll, filter, bb*).

src/client/assets/translations/oasis_en.js

@@ -387,6 +387,19 @@ module.exports = {
     menuEconomy: "Economy",
     menuMedia: "Media",
     menuTools: "Tools",
+    menuCommunity: "Community",
+    menuAll: "All",
+    filter: "Filter",
+    bbAdd: "Add",
+    bbManage: "Edit",
+    bbRemove: "Remove",
+    bbQuickActions: "Quick actions",
+    bbYourBar: "Your bar",
+    bbFull: "Maximum reached",
+    bbDone: "Done",
+    bbPickTitle: "Customize the bar",
+    bbPickDesc: "Choose up to 4 shortcuts for the bottom bar.",
+    bbPickNone: "None",
     comment: "Comment",
     subtopic: "Subtopic",
     json: "JSON",