Replace season editor with the generic editor.

forms.py

@@ -8,11 +8,21 @@ from wtforms import (
     DecimalField,
     SelectField,
 )
-from wtforms.validators import DataRequired
+from wtforms.validators import DataRequired, Optional
 
 import choices
 
 
+class SeasonForm(FlaskForm):
+    season_id = StringField("Season ID", render_kw={"readonly": True})
+    code = StringField("Season Code", validators=[DataRequired()])
+    game_name = StringField("Game Name", validators=[DataRequired()])
+    description = StringField("Season Description")
+    start = DateField("Season Start", format="%Y-%m-%d", validators=[DataRequired()])
+    end = DateField("Season End", format="%Y-%m-%d", validators=[Optional()])
+    submit_button = SubmitField("Submit")
+
+
 class EpisodeForm(FlaskForm):
     season_id = StringField("Season ID", render_kw={"readonly": True})
     episode_id = StringField("Episode ID", render_kw={"readonly": True})