Add ransomware report tab

[shreyamalviya]

What does this PR do?

Fixes #1240
Ransomware tab is not hidden if no ransomware options are enabled

PR Checklist

• Have you added an explanation of what your changes do and why you'd like to include them?
• Is the TravisCI build passing?
• Was the CHANGELOG.md updated to reflect the changes?
• Was the documentation framework updated to reflect the changes?

Testing Checklist

• Added relevant unit tests?
• Have you successfully tested your changes locally? Elaborate:

  Tested by {Running the Monkey locally with relevant config/running Island/...}

• If applicable, add screenshots or log transcripts of the feature working

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[codecov]

Codecov Report

Merging #1291 (6622fc0) into develop (f698c88) will decrease coverage by 1.33%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #1291      +/-   ##
===========================================
- Coverage    30.68%   29.34%   -1.34%     
===========================================
  Files          449      452       +3     
  Lines        13470    14286     +816     
===========================================
+ Hits          4133     4192      +59     
- Misses        9337    10094     +757     

Impacted Files	Coverage Δ
monkey/infection_monkey/exploit/tools/helpers.py	32.00% <0.00%> (-4.37%)	⬇️
monkey/infection_monkey/exploit/wmiexec.py	23.63% <0.00%> (-3.77%)	⬇️
monkey/monkey_island/cc/app.py	0.00% <0.00%> (ø)
monkey/infection_monkey/dropper.py	0.00% <0.00%> (ø)
monkey/monkey_island/cc/server_setup.py	0.00% <0.00%> (ø)
monkey/infection_monkey/exploit/hadoop.py	0.00% <0.00%> (ø)
monkey/infection_monkey/exploit/vsftpd.py	0.00% <0.00%> (ø)
monkey/infection_monkey/model/__init__.py	100.00% <0.00%> (ø)
monkey/infection_monkey/exploit/smbexec.py	0.00% <0.00%> (ø)
monkey/infection_monkey/exploit/sshexec.py	0.00% <0.00%> (ø)
... and 13 more

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[mssalvatore]

This assumes that Monkey Island will instruct the frontend whether or not it should show the report, which isn't the Island's responsibility. See #1297 (comment)

This component will probably need to show the tab if there is any data in the report, or hide it otherwise.

[mssalvatore]

It's probably worth investigating the findings from DeepCode and addressing them.