So, I took another look on the state of keyboard navigation in PolyGerrit:
almost all major screens: change list, change and diff screens support
the needed keyboard shortcuts.
Beside this missing feature on change list screen: [1], and this bug with
dashboard: [2] we have this annoying problem (also known from GWT
based screen, that got fixed recently): non-recognizing "[" and "]" keys
on west european keyboard layouts in diff screen: [3], [4].
In [4] it was referenced to this Chrome issue: [5] that was closed with the
reference to this GH issue: [6], that mentioned that in recent Chrome and
FF versions key attribute of KeyboardEvent should provide the required
fidelity for pressed keys across different keyboard layouts. We also have
this accepted gerrit issue: [7] that states, that "Since Chrome 51 has
implemented the 'key' field of KeyboardEvent, it allows us to start using it again
for KB shortcuts."
I understand that the core PolyGerrit users and developers don't suffer
from this problem because all is fine with the current code on the english
keyboard layout. However, I would really appreciate if we can find a working
solution ASAP for this problem on non-english keyboard layouts. Thanks!