Add Oasis-Mobile-UX theme with hexagon navigation

- Selectable Oasis-Mobile-UX theme; mobile.css kept intact
- Hexagon category launcher on home (10 categories with expandable modules)
- Customizable bottom bar (up to 4 shortcuts, Peers/Invites fixed)
- Empty states and collapsible activity filters

src/configs/config-manager.js

@@ -78,6 +78,7 @@ if (!fs.existsSync(configFilePath)) {
       "limit": 2000
     },
     "homePage": "activity",
+    "bottomBarPins": ["search", "inbox", "publish"],
     "language": "en",
     "wish": "whole",
     "pmVisibility": "whole",
@@ -96,6 +97,15 @@ const getConfig = () => {
   if (cfg.ux.current === 'menus') cfg.ux.current = 'blocks';
   if (cfg.ux.current !== 'blocks' && cfg.ux.current !== 'ainav') cfg.ux.current = 'blocks';
   if (cfg.ux.current === 'ainav' && cfg.modules && cfg.modules.aiNavMod !== 'on') cfg.ux.current = 'blocks';
+  let pins = Array.isArray(cfg.bottomBarPins)
+    ? cfg.bottomBarPins
+    : (typeof cfg.bottomBarPin === 'string'
+        ? (cfg.bottomBarPin ? [cfg.bottomBarPin] : [])
+        : ['search', 'inbox', 'publish']);
+  pins = pins.filter(k => typeof k === 'string' && k);
+  pins = pins.filter((k, i) => pins.indexOf(k) === i).slice(0, 4);
+  cfg.bottomBarPins = pins;
+  delete cfg.bottomBarPin;
   return cfg;
 };