Enable traversal and selection of Suggestions via Keyboard.

[HemanshuGandhi]

Part of Hemanshu's Deliverables as per #380

• Allows Traversal in and out of CommandBox / SuggestionsList using Arrow Keys.
• Autofills Command Box when user selects an item via "Enter".

[netlify[bot]]

Deploy preview for notably-app ready!

Built with commit a5d395bbd4c3cc4afaec802c0d3789aeba423a83

https://deploy-preview-445--notably-app.netlify.com

[codecov[bot]]

Codecov Report

:exclamation: No coverage uploaded for pull request base (master@abfbccb). Click here to learn what that means. The diff coverage is 0.00%.

@@            Coverage Diff            @@
##             master     #445   +/-   ##
=========================================
  Coverage          ?   66.93%           
  Complexity        ?      568           
=========================================
  Files             ?       99           
  Lines             ?     2202           
  Branches          ?      213           
=========================================
  Hits              ?     1474           
  Misses            ?      654           
  Partials          ?       74           

Impacted Files	Coverage Δ	Complexity Δ
src/main/java/com/notably/view/CommandBox.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...n/java/com/notably/view/SuggestionsWindowView.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...com/notably/logic/correction/CorrectionResult.java	68.75% <0.00%> (ø)	5.00% <0.00%> (?%)
src/main/java/com/notably/view/ViewManager.java	0.00% <0.00%> (ø)	0.00% <0.00%> (?%)
...n/java/com/notably/logic/commands/EditCommand.java	100.00% <0.00%> (ø)	4.00% <0.00%> (?%)
...ly/logic/commands/exceptions/CommandException.java	50.00% <0.00%> (ø)	1.00% <0.00%> (?%)
...c/commands/suggestion/DeleteSuggestionCommand.java	100.00% <0.00%> (ø)	10.00% <0.00%> (?%)
src/main/java/com/notably/commons/Version.java	82.50% <0.00%> (ø)	19.00% <0.00%> (?%)
.../com/notably/storage/JsonAdaptedBlockTreeItem.java	96.96% <0.00%> (ø)	8.00% <0.00%> (?%)
...main/java/com/notably/logic/parser/ParserUtil.java	85.71% <0.00%> (ø)	4.00% <0.00%> (?%)
... and 91 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update abfbccb...a5d395b. Read the comment docs.