Css update for version update on welcome page

[mohitsuman]

Fix #1390

• This will show if there is a new version available to download

• This will show Check for version and message if it is current version.

[codecov-io]

Codecov Report

Merging #1391 into master will decrease coverage by 0.53%. The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #1391      +/-   ##
==========================================
- Coverage   92.64%   92.11%   -0.54%     
==========================================
  Files          47       47              
  Lines        4895     4969      +74     
  Branches      549      864     +315     
==========================================
+ Hits         4535     4577      +42     
- Misses        360      362       +2     
- Partials        0       30      +30

Impacted Files	Coverage Δ
browser/pages/welcome/controller.js	100% <100%> (ø)	:arrow_up:
browser/model/devstudio-autoinstall.js	97.29% <0%> (-2.71%)	:arrow_down:
browser/pages/install/controller.js	91.86% <0%> (-1.75%)	:arrow_down:
browser/model/helpers/downloader.js	95.53% <0%> (-1.68%)	:arrow_down:
browser/model/che.js	95% <0%> (-1.62%)	:arrow_down:
browser/services/platform.js	98.14% <0%> (-1.48%)	:arrow_down:
browser/model/jdk-install.js	91.57% <0%> (-1.47%)	:arrow_down:
browser/pages/account/controller.js	98.61% <0%> (-1.39%)	:arrow_down:
browser/model/cdk.js	97.6% <0%> (-1.16%)	:arrow_down:
browser/model/devstudio-p2-zip.js	64.4% <0%> (-1.12%)	:arrow_down:
... and 25 more

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