Cherry-pick nbgl updates

[cedelavergne-ledger]

Description

Retrieve NBGL modifications from ledger-secure-sdk HEAD:

• 66918cc: Update README.md
• 05b51de: Update README.md
• 8fc46ea: Fix missing lines in long tag/values, with no "More" button
• b9fdc91: Add streaming Blind Signing Review Use Case
• d3e71bc: Add non-streaming Blind Signing Review Use Case
• 70b521c: Fix replacement of last char by "..." when using nbgl_textWrapOnNbLines()
• 3cbbbda: Fix character loss in detail pairs with text wrapping enabled
• 9536a33: Minor nbgl doc fixes
• 8b41174: Flex/Stax: Progress bar drawing - add comments
• bf4a739: Flex/Stax: Fix progress bar glitch
• 4fe6a45: Rename and simplify object drawing API
• cbbb6c1: Use array of functions to draw objects by types (more efficient)
• 55e92fc: Fix missing PICs in NBGL Use Cases
• 26a1cfd: Remove language dependency from NBGL
• f33c799: Flex: Add nbgl masking syscall
• 88279f0: Fix missing Tap To Continue in transactions
• 5a10d3f: Automatic computation of number of items per settings page
• 5039a6a: Add extended-center content to contain both centered info and tip-box
• d2f584c: Create up-footer layout object to contain some types of objects
• 350c27d: Improve rendering of some unicode & ASCII characters
• e0944a0: Fix Russian unicode characters
• af6592c: Fix German, Portuguese & Turkish unicode characters
• 266a956: Fix Spanish & French unicode characters
• 86c4bf0: FWEO-1214 make alphabet letters bold again lnsp lnx
• 4c7e13f: Fix wrong highlighted app icon on Nano when this icon is compress

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 59.81308% with 43 lines in your changes missing coverage. Please review.

Project coverage is 59.96%. Comparing base (603cf09) to head (66918cc).
Report is 24 commits behind head on API_LEVEL_21.

Files with missing lines	Patch %	Lines
lib_nbgl/src/nbgl_fonts.c	59.61%	21 Missing ⚠️
lib_nbgl/src/nbgl_obj.c	72.09%	12 Missing ⚠️
lib_nbgl/src/nbgl_screen.c	16.66%	10 Missing ⚠️

Additional details and impacted files

@@               Coverage Diff                @@
##           API_LEVEL_21     #762      +/-   ##
================================================
- Coverage         60.19%   59.96%   -0.24%     
================================================
  Files                12       12              
  Lines              1726     1721       -5     
================================================
- Hits               1039     1032       -7     
- Misses              687      689       +2     

Flag	Coverage Δ
unittests	59.96% <59.81%> (-0.24%)	⬇️

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