Bumps [@babel/core](https://github.com/babel/babel) from 7.6.4 to 7.7.2.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/master/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/compare/v7.6.4...v7.7.2

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bump @babel/preset-env from 7.6.3 to 7.7.1

Bumps [@babel/preset-env](https://github.com/babel/babel) from 7.6.3 to 7.7.1.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/master/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/compare/v7.6.3...v7.7.1

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps pear-pear.horde.org/Horde_Util from 2.5.8 to 2.5.9.

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Fall back to attachment name from content type if it's not set in con…

 IMPROVE: don't show popover for addresses without a display name/label

 IMPROVE: navigation settings styling improvement (spacing etc.)

Signed-off-by: Jonas Sulzer <jonas@violoncello.ch>

 IMPROVE: make add-account primary && make keyboard shortcuts a button && underline encryption suggestion / link to mailvelope

Signed-off-by: Jonas Sulzer <jonas@violoncello.ch>

Signed-off-by: Jonas Sulzer <jonas@violoncello.ch>

relocate toggle arrow button

Signed-off-by: Greta Doci <gretadoci@gmail.com>

fix the CI error

Signed-off-by: Greta Doci <gretadoci@gmail.com>

fix background color

Signed-off-by: Greta Doci <gretadoci@gmail.com>

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Switch to babel.config.js and @babel/preset-env

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Add GitHub action linters

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Fix groups expansion on umlauts

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Bumps [ezyang/htmlpurifier](https://github.com/ezyang/htmlpurifier) from 4.11.0 to 4.12.0.
- [Release notes](https://github.com/ezyang/htmlpurifier/releases)
- [Changelog](https://github.com/ezyang/htmlpurifier/blob/master/NEWS)
- [Commits](https://github.com/ezyang/htmlpurifier/compare/v4.11.0...v4.12.0

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bump phan/phan from 2.3.0 to 2.4.0

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Update CKEditor to v15

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>