Streak 2.8.0

A weekly strip in Today, keyboard shortcuts on desktop, your system accent color
and a round of fixes for to-dos and buttons. Thanks to everyone who opened an
issue, this release is mostly yours.

🏠 Today

• Weekly strip (#167): a row with the days of the week and a sheet for each
  day. It is off by default, turn it on in Settings.

💻 Desktop

• Keyboard shortcuts (#493) and a sheet that lists them.

🎨 Look

• Use the system accent color as the app color.
• Readable button text on any accent color, and dialog buttons that stack
  instead of shrinking (#499).
• A solid area behind the system navigation buttons on the habit page
  (#498).

📝 To-dos

• Add a to-do in one tap, long press to pick the project, and fold
  sections (#489, #492).
• Tags: the keyboard closes on the tag icon and color, and a new tag is kept
  when its tray is swiped away (#495).
• Tapping outside a text field removes the cursor, tooltips show above the
  navigation buttons and the Focus toggle clears its estimate (#486, #488,
  #490).

🗓️ Plan

• Just-tracking habits stay out of Plan when "Hide just tracking" is on in
  the Today filter (#497).

⏱️ Focus

• Change habit during a break (#430).

🌍 Languages

• Updated Arabic, Catalan, Korean and Russian. Thanks to everyone on Weblate.