-added change custom background to command line

-trimmed url input to reduce errors

src/js/commandline-lists.js

@@ -1596,6 +1596,14 @@ export let defaultCommands = {
         Commandline.show();
       },
     },
+    {
+      id: "changeCustomBackground",
+      display: "Change custom background...",
+      input: true,
+      exec: (input) => {
+        UpdateConfig.setCustomBackground(input);
+      },
+    },
     {
       id: "changeTheme",
       display: "Change theme...",

src/js/config.js

@@ -1349,6 +1349,7 @@ export function setCustomBackground(value, nosave) {
   if (value == null || value == undefined) {
     value = "";
   }
+  value = value.trim();
   if( /(https|http):\/\/(www\.|).+\..+\/.+(\.png|\.gif|\.jpeg|\.jpg)/gi.test(value) || value == ""){
     config.customBackground = value;
     ThemeController.applyCustomBackground();