Fix too long text shortening in details

[nroggeman-ledger]

Description

The goal of this PR is to fix 2 issues with two long "value" fields in reviews:

• In case of a "Skippable" review, the last line of value may be out of the area
• In the "Details" view, the last line may be wrongly cut (at "...") if ending with a '\n'

Changes include

• Bugfix (non-breaking change that solves an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (change that is not backwards-compatible and/or changes current functionality)
• Tests
• Documentation
• Other (for changes that might not fit in any category)

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 59.89%. Comparing base (ac62f3e) to head (5544a00).

Files with missing lines	Patch %	Lines
lib_nbgl/src/nbgl_fonts.c	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #763      +/-   ##
==========================================
- Coverage   59.96%   59.89%   -0.07%     
==========================================
  Files          12       12              
  Lines        1721     1723       +2     
==========================================
  Hits         1032     1032              
- Misses        689      691       +2     

Flag	Coverage Δ
unittests	59.89% <0.00%> (-0.07%)	⬇️

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