plot-profit: Make "auto-open" HTML result optional

Adding an "--auto-open" argument.
This improves tool processing of the results, while still allowing to open the HTML file for easy use.

tests/test_arguments.py

@@ -186,18 +186,22 @@ def test_plot_dataframe_options() -> None:
     assert pargs['pairs'] == ['UNITTEST/BTC']
 
 
-def test_plot_profit_options() -> None:
+@pytest.mark.parametrize('auto_open_arg', [True, False])
+def test_plot_profit_options(auto_open_arg: bool) -> None:
     args = [
         'plot-profit',
         '-p', 'UNITTEST/BTC',
         '--trade-source', 'DB',
         '--db-url', 'sqlite:///whatever.sqlite',
     ]
+    if auto_open_arg:
+        args.append('--auto-open')
     pargs = Arguments(args).get_parsed_arg()
 
     assert pargs['trade_source'] == 'DB'
     assert pargs['pairs'] == ['UNITTEST/BTC']
     assert pargs['db_url'] == 'sqlite:///whatever.sqlite'
+    assert pargs['plot_auto_open'] == auto_open_arg
 
 
 def test_config_notallowed(mocker) -> None:

tests/test_plotting.py

@@ -460,7 +460,7 @@ def test_plot_profit(default_conf, mocker, testdatadir):
     assert store_mock.call_count == 1
 
     assert profit_mock.call_args_list[0][0][0] == default_conf['pairs']
-    assert store_mock.call_args_list[0][1]['auto_open'] is True
+    assert store_mock.call_args_list[0][1]['auto_open'] is False
 
 
 @pytest.mark.parametrize("ind1,ind2,plot_conf,exp", [