Ecocal improve

[montezdesousa]

Description

This PR incorporates some feedback given by @deeleeramone.

Major changes are the following:

• Fix country selection allowing euro zone economic events
• New default for dates is the current calendar day, instead of limiting to 10 rows
• New default for ecocal is -c = 'all' & -i = 'high', since the # of events where the importance is high globally is a relatively small number for any single day
• Fix date formatting to match YYYY-MM-DD
• Capitalize country names and headers
• Remove "zone" column when just one country and display country name in header

• Summary of the change / bug fix.
• Screenshot of the feature or the bug before/after fix, if applicable.
• Relevant motivation and context.

How has this been tested?

ecocal
pytest tests\openbb_terminal\economy\test_investingcom_view.py -k test_display_economic_calendar

Others

• I have performed a self-review of my own code.
• My code passes all the checks pylint, flake8, black, ... To speed up development you should run pre-commit install.
• New and existing unit tests pass locally with my changes. You can test this locally using pytest tests/....

[minhhoang1023]

looks great! 🚀