Faulty list view when back navigating

[Arif-Khalid]

Summary:

Fixes #1227

Changes Made:

• New model table-settings which stores kept settings
• New service issue-table-settings service which stores these table settings by table name
• Synchronization of component table settings and service table settings
• Clear of service table settings on routing
• Settings saved include page index, page size, active sort and active sort direction

Proposed Commit Message:

Issue table settings such as page index are not 
saved when table is re-mounted.

This behavior inconveniences users as their settings 
are reset everytime they navigate to a specific issue and back.

Let's lift up the table settings of each mounted table to 
a service which the tables pull from when mounted.

[codecov-commenter]

Codecov Report

Attention: 23 lines in your changes are missing coverage. Please review.

Comparison is base (a9d38dd) 53.44% compared to head (63ddff1) 53.10%.

Files	Patch %	Lines
.../app/shared/issue-tables/issue-tables.component.ts	15.38%	8 Missing and 3 partials :warning:
.../app/core/services/issue-table-settings.service.ts	27.27%	4 Missing and 4 partials :warning:
src/app/core/models/table-settings.model.ts	0.00%	4 Missing :warning:

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1243 +/- ## ========================================== - Coverage 53.44% 53.10% -0.35% ========================================== Files 103 105 +2 Lines 2928 2951 +23 Branches 544 549 +5 ========================================== + Hits 1565 1567 +2 - Misses 1014 1030 +16 - Partials 349 354 +5 ```

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