couple of fixes for the seeds structure

STRUCTURE

@@ -4,8 +4,8 @@ core: core-gtk
 core-gtk: standard
 core-qt: standard
 desktop: core desktop-gtk
-desktop-gtk: standard
+desktop-gtk: core-gtk standard
-desktop-qt: standard
+desktop-qt: core-qt standard
 live: desktop live-common
 live-gtk: desktop-gtk live-common
 live-qt: desktop-qt live-common

core-gtk

@@ -2,8 +2,7 @@ Task-Per-Derivative: 1
 Task-Section: user
 Task-Description: Lubuntu minimal installation
 Task-Extended-Description: This task provides minimal packages for Lubuntu (Ubuntu LXDE environment).
-Task-Key: lubuntu-core
+Task-Key: lubuntu-core-gtk
-Task-Seeds: desktop-common
 
  * Feature: no-follow-recommends
 

core-qt

@@ -2,8 +2,7 @@ Task-Per-Derivative: 1
 Task-Section: user
 Task-Description: Lubuntu minimal installation
 Task-Extended-Description: This task provides minimal packages for Lubuntu (Ubuntu LXDE environment).
-Task-Key: lubuntu-core
+Task-Key: lubuntu-core-qt
-Task-Seeds: desktop-common
 
  * Feature: no-follow-recommends
 

desktop

@@ -3,6 +3,7 @@ Task-Section: user
 Task-Description: Lubuntu Desktop
 Task-Extended-Description: This task provides the Lubuntu (Ubuntu LXDE environment).
 Task-Key: lubuntu-desktop
+Task-Seeds: desktop-gtk
 
  * Feature: no-follow-recommends
 

desktop-gtk

@@ -3,6 +3,7 @@ Task-Section: user
 Task-Description: Lubuntu Desktop (GTK part)
 Task-Extended-Description: This task provides the Lubuntu (Ubuntu LXDE environment).
 Task-Key: lubuntu-desktop-gtk
+Task-Seeds: core-gtk
 
  * Feature: no-follow-recommends
  

desktop-qt

@@ -3,6 +3,7 @@ Task-Section: user
 Task-Description: Lubuntu Qt Desktop
 Task-Extended-Description: This task provides the Lubuntu (Ubuntu LXQt environment).
 Task-Key: lubuntu-desktop-qt
+Task-Seeds: core-qt
 
  * Feature: no-follow-recommends