Added Ability to Order Impossible TN Parts from Acquisitions Dialog.

[IllianiCBT]

Current Implementation

Currently it is not possible to purchase items, from the Parts Acquisition dialog, if that part has a TN >12.

Problem

This forces users to manually order the item from the Purchase Parts dialog. This can be a little awkward, if the part in question has multiple variants (based on weight, for example).

Solution

It is not possible to order Impossible TN missing parts from the Parts Acquisition dialog. In instances where the TN is impossible, this is clearly labeled.

…Closes #3359

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 13 lines in your changes are missing coverage. Please review.

Project coverage is 10.65%. Comparing base (eaeb54e) to head (34500ee).
Report is 2 commits behind head on master.

Files	Patch %	Lines
MekHQ/src/mekhq/gui/dialog/AcquisitionsDialog.java	0.00%	13 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #3975      +/-   ##
============================================
- Coverage     10.65%   10.65%   -0.01%     
  Complexity     5536     5536              
============================================
  Files           841      841              
  Lines        114411   114422      +11     
  Branches      17209    17210       +1     
============================================
  Hits          12189    12189              
- Misses       100992   101003      +11     
  Partials       1230     1230              

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