dtlaunch: Bangle 2: Fix showClocks and showLaunchers settings

... not taking effect by now clearing cache when changing those settings.

apps/dtlaunch/ChangeLog

@@ -32,3 +32,5 @@ when moving pages. Add caching for faster startups.
 0.25: Minor code improvements
 0.26: Bangle 2: Postpone loading icons that are not needed initially.
 0.27: Bangle 2: Add setting to remember and present the last open page between instances of dtlaunch.
+0.28: Bangle 2: Fix showClocks and showLaunchers settings not taking effect by
+      clearing cache when changing those settings.

apps/dtlaunch/metadata.json

@@ -1,7 +1,7 @@
 {
   "id": "dtlaunch",
   "name": "Desktop Launcher",
-  "version": "0.27",
+  "version": "0.28",
   "description": "Desktop style App Launcher with six (four for Bangle 2) apps per page - fast access if you have lots of apps installed.",
   "screenshots": [{"url":"shot1.png"},{"url":"shot2.png"},{"url":"shot3.png"}],
   "icon": "icon.png",

apps/dtlaunch/settings-b2.js

@@ -17,6 +17,10 @@
 
   const timeOutChoices = [/*LANG*/"Off", "10s", "15s", "20s", "30s"];
 
+  function clearCache() {
+    require("Storage").erase("launch.cache.json")
+  }
+
   E.showMenu({
     "" : { "title" : "Desktop launcher" },
     /*LANG*/"< Back" : () => back(),
@@ -25,6 +29,7 @@
       onchange: v => {
         settings.showClocks = v;
         writeSettings();
+        clearCache();
       }
     },
     /*LANG*/'Show launchers': {
@@ -32,6 +37,7 @@
       onchange: v => {
         settings.showLaunchers = v;
         writeSettings();
+        clearCache();
       }
     },
     /*LANG*/'Direct launch': {