Refactor New Portfolio page according to designs.

New designs call for a streamlined New Portfolio page, with far
fewer input options. This commit refactors that page according to those
designs.

Some of the route functions in this commit refer to a "step 1" of creating
a new Portfolio. Though there is no "step 2" right now, the designs call
for a multistep flow for Portfolio creation process, so this commit sets
the stage for that.

alembic/versions/802071bcd013_remove_unneeded_portfolio_columns.py

@@ -0,0 +1,40 @@
+"""Remove unneeded portfolio columns
+
+Revision ID: 802071bcd013
+Revises: 67a2151d6269
+Create Date: 2019-12-11 13:26:34.770480
+
+"""
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision = '802071bcd013' # pragma: allowlist secret
+down_revision = '67a2151d6269' # pragma: allowlist secret
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('portfolios', 'dev_team')
+    op.drop_column('portfolios', 'complexity')
+    op.drop_column('portfolios', 'team_experience')
+    op.drop_column('portfolios', 'dev_team_other')
+    op.drop_column('portfolios', 'app_migration')
+    op.drop_column('portfolios', 'native_apps')
+    op.drop_column('portfolios', 'complexity_other')
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('portfolios', sa.Column('complexity_other', sa.VARCHAR(), autoincrement=False, nullable=True))
+    op.add_column('portfolios', sa.Column('native_apps', sa.VARCHAR(), autoincrement=False, nullable=True))
+    op.add_column('portfolios', sa.Column('app_migration', sa.VARCHAR(), autoincrement=False, nullable=True))
+    op.add_column('portfolios', sa.Column('dev_team_other', sa.VARCHAR(), autoincrement=False, nullable=True))
+    op.add_column('portfolios', sa.Column('team_experience', sa.VARCHAR(), autoincrement=False, nullable=True))
+    op.add_column('portfolios', sa.Column('complexity', postgresql.ARRAY(sa.VARCHAR()), autoincrement=False, nullable=True))
+    op.add_column('portfolios', sa.Column('dev_team', postgresql.ARRAY(sa.VARCHAR()), autoincrement=False, nullable=True))
+    # ### end Alembic commands ###