Add In Progress list to Ideas list

[iMattPro]

It would be useful to add the latest "In Progress" Ideas to the front Ideas page.

Also, replaced multiple duplicated twig fragments with a macro and fixed some missing/broken lang/key vars.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.11%. Comparing base (139bb0e) to head (43e0be5).
⚠️ Report is 37 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #160      +/-   ##
============================================
+ Coverage     99.03%   99.11%   +0.08%     
- Complexity      236      262      +26     
============================================
  Files            20       21       +1     
  Lines           826      901      +75     
============================================
+ Hits            818      893      +75     
  Misses            8        8              

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