Fixing default view and ascending order in cglosers and cggainers

[simmonsj330]

Description

Fixes #1905
Made default cglosers sort by Market Cap [$] and switched ordering of sorting from descending to ascending.

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[jmaslek]

hmmm. The market cap still sorts in reverse order

2022 Jun 10, 09:15 (🦋) /crypto/disc/ $ cggainers -s Market Cap [$]

┏━━━━━━━━┳━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━┳━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━┳━━━━━━━━━━━━━━━┓
┃ Symbol ┃ Name              ┃ Price [$] ┃ Market Cap [$] ┃ Market Cap Rank ┃ Volume [$] ┃ Change 1h [%] ┃
┡━━━━━━━━╇━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━╇━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━╇━━━━━━━━━━━━━━━┩
│ dai    │ Dai               │ 1.00      │ 6.6B           │ 15              │ 204.6M     │ -0.08         │
├────────┼───────────────────┼───────────┼────────────────┼─────────────────┼────────────┼───────────────┤
│ steth  │ Lido Staked Ether │ 1665.17   │ 7B             │ 14              │ 167.9M     │ -2.43         │
├────────┼───────────────────┼───────────┼────────────────┼─────────────────┼────────────┼───────────────┤

Also having to have the user type out Market Cap [$] is tedious, and should be able to sort by Market Cap (then we can add in the ($) after the fact.

You are also getting a warning which can be directly applied to pycoingecko_model (df = pd.concat([df, pd.DataFrame(data)]) instead of using append)

[DidierRLopes]

After doing James requests, for the test to pass you need to do:
pytest tests/openbb_terminal/cryptocurrency/discovery/test_pycoingecko_view.py --record-mode=rewrite

[simmonsj330]

@jmaslek Sorting is in ascending order where the lowest market cap would put it at the highest market cap rank. For example bitcoin is the 1 market cap rank and appears at the top when sorting by rank but appears at the bottom when sorting by market cap itself

[jmaslek]

@jmaslek Sorting is in ascending order where the lowest market cap would put it at the highest market cap rank. For example bitcoin is the 1 market cap rank and appears at the top when sorting by rank but appears at the bottom when sorting by market cap itself

I see. One could technically sort on the negative rank, but I think the user should understand why the sorting is in reverse order for the rank. So just add the test and you are good to go!