Add minimal install option.

desktop-gtk.minimal-remove

@@ -0,0 +1,17 @@
+xul-ext-ubufox
+sylpheed
+sylpheed-i18n
+sylpheed-plugins
+sylpheed-doc
+pidgin
+transmission-gtk
+mtpaint
+lxtask
+hardinfo
+guvcview
+usb-creator-gtk
+abiword
+gnumeric
+evince
+xpad
+gnome-software

desktop-qt.minimal-remove

@@ -0,0 +1,21 @@
+transmission-qt
+quassel
+smplayer
+smplayer-l10n
+smplayer-themes
+smtube
+calibre
+2048-qt
+featherpad
+noblenote
+ark
+screengrab
+nomacs
+qps
+libreoffice-calc
+libreoffice-impress
+libreoffice-writer
+libreoffice-kde
+qpdfview
+skanlite
+plasma-discover