alot: Put included themes where alot will find them

Instead of putthing them in the wrong place and then pointing alog at it
via default config, put them in the right place and don't touch the
default config.

pkgs/development/python-modules/alot/default.nix

@@ -19,12 +19,6 @@ buildPythonPackage rec {
     sha256 = "1y932smng7qx7ybmqw4qh75b0lv9imfs5ak9fd0qhysij8kpmdhi";
   };
 
-  postPatch = ''
-    substituteInPlace alot/defaults/alot.rc.spec \
-      --replace "themes_dir = string(default=None)" \
-                "themes_dir = string(default='$out/share/themes')"
-  '';
-
   nativeBuildInputs = lib.optional withManpage sphinx;
 
   propagatedBuildInputs = [
@@ -50,8 +44,8 @@ buildPythonPackage rec {
     cp -r docs/build/man $out/man
   ''
   + ''
-    mkdir -p $out/share/applications
-    cp -r extra/themes $out/share
+    mkdir -p $out/share/{applications,alot}
+    cp -r extra/themes $out/share/alot
 
     sed "s,/usr/bin,$out/bin,g" extra/alot.desktop > $out/share/applications/alot.desktop
   '';