bloomrpc: Add fix when opening a file browser

```
(bloomrpc:2): GLib-GIO-ERROR **: 12:51:02.584: No GSettings schemas are installed on the system
```

pkgs/development/web/bloomrpc/default.nix

@@ -1,4 +1,4 @@
-{ lib, fetchurl, appimageTools }:
+{ lib, fetchurl, gsettings-desktop-schemas, gtk3, appimageTools }:
 
 let
   pname = "bloomrpc";
@@ -13,9 +13,15 @@ let
   appimageContents = appimageTools.extractType2 {
     inherit pname src version;
   };
-in appimageTools.wrapType2 {
+in
+appimageTools.wrapType2 {
   inherit pname src version;
 
+  profile = ''
+    export LC_ALL=C.UTF-8
+    export XDG_DATA_DIRS=${gsettings-desktop-schemas}/share/gsettings-schemas/${gsettings-desktop-schemas.name}:${gtk3}/share/gsettings-schemas/${gtk3.name}:$XDG_DATA_DIRS
+  '';
+
   multiPkgs = null; # no 32bit needed
   extraPkgs = pkgs: appimageTools.defaultFhsEnvArgs.multiPkgs pkgs ++ [ pkgs.bash ];