move some useflags from minimalist to sage

package.use/minimalist.dependencies

@@ -1,14 +1,9 @@
 # minimal interfaces for ipython and matplotlib
-dev-python/ipython -wxwidgets -qt5 -smp nbconvert
+dev-python/ipython -wxwidgets -qt5 -smp
 dev-python/matplotlib -gtk3 -qt5 -wxwidgets
 # symengine is not ready for flint3
 dev-python/sympy -opengl -symengine
 # minimize build dependency for maxima
 sci-mathematics/maxima -sbcl -gui
 # prefer threads as funny things may happen with openmp
 sci-libs/openblas -openmp pthread
-# matplotlib requirements
-media-libs/harfbuzz icu
-dev-python/pillow webp
-virtual/imagemagick-tools tiff jpeg
-media-gfx/imagemagick tiff jpeg

package.use/sage

@@ -2,7 +2,7 @@ dev-lang/python             readline sqlite
 dev-libs/boost              python
 dev-libs/boehm-gc           threads
 dev-python/cvxopt           glpk gsl
-dev-python/ipython          notebook
+dev-python/ipython          notebook nbconvert
 dev-python/numpy            lapack
 dev-python/pplpy            doc
 media-libs/gd               jpeg png
@@ -22,6 +22,11 @@ sys-devel/gcc               fortran
 # bliss seems to be broken with latest gmp at least in sage doctests
 sci-libs/bliss              -gmp
 
+# matplotlib requirements
+media-libs/harfbuzz icu
+dev-python/pillow webp
+virtual/imagemagick-tools tiff jpeg
+media-gfx/imagemagick tiff jpeg
 # matplotlib (testing)
 x11-base/xorg-server        xvfb