[core] Align internal icons with mono-repository

[oliviertassinari]

• Remove redundant Icon suffix
• Use import *
• Label as internal, a deterrent for developers to import these icons
• Remove useless paths

[vercel]

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[codecov]

Codecov Report

Merging #1692 into next will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             next    #1692   +/-   ##
=======================================
  Coverage   89.76%   89.76%           
=======================================
  Files          73       73           
  Lines        2315     2315           
  Branches      402      402           
=======================================
  Hits         2078     2078           
  Misses        190      190           
  Partials       47       47           

Impacted Files	Coverage Δ
lib/src/_shared/icons/ArrowDropDownIcon.tsx	100.00% <100.00%> (ø)
lib/src/_shared/icons/ArrowLeftIcon.tsx	100.00% <100.00%> (ø)
lib/src/_shared/icons/ArrowRightIcon.tsx	100.00% <100.00%> (ø)
lib/src/_shared/icons/CalendarIcon.tsx	100.00% <100.00%> (ø)
lib/src/_shared/icons/ClockIcon.tsx	100.00% <100.00%> (ø)
lib/src/_shared/icons/DateRangeIcon.tsx	100.00% <100.00%> (ø)
lib/src/_shared/icons/PenIcon.tsx	100.00% <100.00%> (ø)
lib/src/_shared/icons/TimeIcon.tsx	100.00% <100.00%> (ø)

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[dmtrKovalenko]

I'd like not to move to default exports of React at least for now.
And also interesting why visual regression didn't start? Probably because this is a forked branch. Need to investigate – I'd like to see what's changed after deleting paths from SVG.

[oliviertassinari]

What's the concern with the import, it seems we do it most of the time already?
https://github.com/mui-org/material-ui-pickers/blob/0d41c48aaa8b9b6f67e72deee9583340cd218b89/lib/src/views/Clock/ClockNumber.tsx#L1

[dmtrKovalenko]

But it is there ...

[dmtrKovalenko]

@oliviertassinari Sorry I am blind. For some reason I thought you moved *as to default. It is ok – thanks... my bad XD

Its left to figure out what's wrong with visual regression. It's for me probably

[cypress]

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Test summary

69 • 0 • 1 • 0

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Run details

Project	material-ui-pickers
Status	Passed
Commit	6f1bb86
Started	Apr 21, 2020 10:37 AM
Ended	Apr 21, 2020 10:38 AM
Duration	01:14 💡
OS	Linux Debian - 9.11
Browser	Chrome 78

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