corebird 1.4 release.

• Images in quoted tweets now look more like they actually belong to the quoted tweet instead of the quoting tweet.
• Allow deleting tweets from the tweet info page and not just from timelines.
• Fix the user completion not showing all possible results
• Focus the already opened window for an account if the account gets selected in the accounts popover
• Avoid window resizing when typing in the Direct Message text box
• Add 'q' accelerator to tweet rows for quoting
• Add spellchecking. This add a dependency to gspell
• Increase gtk+ dependency to 3.18 to get rid of some workarounds.
• Increase avatar size in profiles and slightly overlap them over the banner. Also, always show the full banner.
• Fix completion popup positioning under Wayland
• Add experimental meson build files
• Fix some videos not playing correctly
• Add a minimal video progress indicator to the video dialog
• Fix the retweet/favorite count updating in the tweet info page