Add improvements to SDK pages and Cellery Hub Pages

[nadundesilva]

Purpose

Add improvements to SDK pages and Cellery Hub Pages.

Goals

Add improvements to SDK pages and Cellery Hub Pages.

Approach

Add improvements to SDK pages and Cellery Hub Pages.

User stories

N/A

Release note

N/A

Documentation

N/A

Training

N/A

Certification

N/A

Marketing

N/A

Automation tests

• Unit tests

  N/A

• Integration tests

  N/A

Security checks

• Followed secure coding standards in http://wso2.com/technical-reports/wso2-secure-engineering-guidelines? yes
• Ran FindSecurityBugs plugin and verified report? yes
• Confirmed that this PR doesn't commit any keys, passwords, tokens, usernames, or other secrets? yes

Samples

N/A

Related PRs

depends on wso2/cellery#445

Migrations (if applicable)

N/A

Test environment

N/A

Learning

N/A

[codecov-io]

Codecov Report

Merging #75 into master will decrease coverage by 0.03%.
The diff coverage is 10.95%.

@@            Coverage Diff            @@
##           master     #75      +/-   ##
=========================================
- Coverage   16.44%   16.4%   -0.04%     
=========================================
  Files          46      48       +2     
  Lines        1569    1615      +46     
  Branches      274     284      +10     
=========================================
+ Hits          258     265       +7     
- Misses       1181    1212      +31     
- Partials      130     138       +8

Impacted Files	Coverage Δ
components/portal/src/components/image/index.js	3.17% <ø> (ø)	⬆️
...nts/portal/src/components/common/error/NotFound.js	27.27% <ø> (ø)	⬆️
components/portal/src/components/sdk/OrgCreate.js	4.16% <ø> (+0.08%)	⬆️
...onents/portal/src/components/common/state/index.js	72.97% <ø> (ø)	⬆️
components/portal/src/components/SignIn.js	9.09% <0%> (ø)	⬆️
...onents/portal/src/components/image/ImageVersion.js	3.03% <0%> (-0.05%)	⬇️
...ts/portal/src/components/sdk/FederatedIdpSelect.js	3.44% <0%> (-0.19%)	⬇️
components/portal/src/components/App.js	23.8% <0%> (ø)	⬆️
...rtal/src/components/common/error/SignInRequired.js	27.27% <27.27%> (ø)
components/portal/src/components/sdk/index.js	9.09% <5%> (-5.73%)	⬇️
... and 3 more

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