fix(timepicker): time convertation with meridian

[Domainv]

Fixes #3861

• read and followed the CONTRIBUTING.md guide.
• built and tested the changes locally.
• added/updated tests.
• added/updated API documentation.
• added/updated demos.

[codecov]

Codecov Report

Merging #4454 (d0d781d) into development (6972d53) will increase coverage by 73.79%.
The diff coverage is 72.72%.

@@               Coverage Diff                @@
##           development    #4454       +/-   ##
================================================
+ Coverage             0   73.79%   +73.79%     
================================================
  Files                0      323      +323     
  Lines                0    11623    +11623     
  Branches             0     2475     +2475     
================================================
+ Hits                 0     8577     +8577     
- Misses               0     1956     +1956     
- Partials             0     1090     +1090     

Impacted Files	Coverage Δ
src/timepicker/timepicker.component.ts	92.61% <70.00%> (ø)
src/timepicker/timepicker.utils.ts	97.91% <100.00%> (ø)
src/datepicker/reducer/bs-datepicker.actions.ts	79.10% <0.00%> (ø)
src/chronos/i18n/nl-be.ts	85.71% <0.00%> (ø)
src/chronos/duration/bubble.ts	87.87% <0.00%> (ø)
src/pagination/index.ts	66.66% <0.00%> (ø)
src/datepicker/engine/flag-years-calendar.ts	85.71% <0.00%> (ø)
src/datepicker/yearpicker.component.ts	55.26% <0.00%> (ø)
src/datepicker/models/index.ts	100.00% <0.00%> (ø)
src/datepicker/utils/bs-calendar-utils.ts	84.84% <0.00%> (ø)
... and 315 more

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[valorkin]

1. enable AM
2. enter 23 (will switch to PM and set 11 on Blur) input value==='11'
3. enter 23 again (onBlur input value==='23')

Can we do some with this?

[Domainv]

lets see

[Domainv]

added a solution, review required
added new gif

[daniloff200]

Project: ngx-bootstrap-demo
Url: https://ngx-bootstrap-demo--pr-4454-wbr2681v.web.app
This link will expire at Sat 27 Feb 2021 12:53:35 PM GMT

[mikolajszymanski]

Hi guys ;) What is the status of this fix? I have same issue in my project and I don't want to make another PR which will do same thing as in this PR. My opened issue is #6306
@daniloff200 @Domainv