Control logging via command line or environment variable

Nheko is very chatty in its log output, generating log noise (which
complicates diagnostics) and needless disk writes (which affect power
consumption and SSD life).  This patch introduces command line options
and environment variables to control log levels and output type.

The old --debug command line option still works, at least for now.
It is overridden by the new command line options when they are used.

Partially addresses #665.

Currently translated at 100.0% (830 of 830 strings)

Co-authored-by: Linerly <linerly@protonmail.com>
Translate-URL: https://weblate.nheko.im/projects/nheko/nheko-master/id/
Translation: Nheko/nheko

Currently translated at 100.0% (830 of 830 strings)

Co-authored-by: Przemysław Romanik <github@rom4nik.pl>
Translate-URL: https://weblate.nheko.im/projects/nheko/nheko-master/pl/
Translation: Nheko/nheko

Currently translated at 100.0% (830 of 830 strings)

Co-authored-by: Jaron Viëtor <jaron@v8or.nl>
Translate-URL: https://weblate.nheko.im/projects/nheko/nheko-master/nl/
Translation: Nheko/nheko

Currently translated at 100.0% (830 of 830 strings)

Co-authored-by: Lurkki14 <jussi.kuokkanen@protonmail.com>
Translate-URL: https://weblate.nheko.im/projects/nheko/nheko-master/fi/
Translation: Nheko/nheko

Currently translated at 100.0% (807 of 807 strings)

Co-authored-by: Przemysław Romanik <github@rom4nik.pl>
Translate-URL: https://weblate.nheko.im/projects/nheko/nheko-master/pl/
Translation: Nheko/nheko

fixes #1180

relates to #1168

fixes #1172

Restore compatibility with clang-format v11

This reverts commit e6b6a764,
because it broke compatibility with clang-format 11 (which is current
on some linux distros) and because it didn't achieve its original
goal. See PR #1166 for discussion.

Fix the position of version

Added discrete edit button to room profiles.

Focus message input box when pressing Esc

Reactions: avoid highlight color misuse, subdue bright border color

This addresses a few problems with reaction colors:

- The state-checking conditionals for reaction text, background, and border
  were inconsistent, making it difficult to choose colors for each state
  (normal, hovered, and self reactions) that worked well in all themes.
- The QPalette::Highlight color was being misused as a text/foreground color.
  This color role is intended for background areas.  It has little contrast
  against the background in themes like KDE Plasma's Breeze High Contrast,
  so using it for text and icons makes those things difficult to read.
  https://doc.qt.io/qt-5/qpalette.html#ColorRole-enum
- The reaction border was drawn in the same color as normal text, making it
  so bright in some dark themes that it distracted from reading nearby text.

Fixes Nheko-Reborn/nheko#1159

This helps with #1065, although I think making sure the message input box gets focus by default would be worthwhile.

see #1042
see #483

Grammar fix:  Group's sidebar -> Groups sidebar