[0] Implement Stickers, rework emoji picker, refactor folder structure

[Jikstra]

• Reworks emoji picker and implements stickers
  • For testing you can send any telegram sticker pack to the @Stickerdownloadbot, download the png version and unpack it's *.png files into ~/.config/DeltaChat/<yourid>/stickers/<somestickerpackname>.
• Refactors Composer, changes onMouseHover behaviour to 'you need to click on emoji picker to open, click somewhere else to close'
• Applies a new and more sane folder structure to src/renderer and scss (one more part of moving styled components to sass). For example we now group components/scss by message, chat, contact...

[Simon-Laux]

Can you re-add the emoji searchbar?
And make the emoji category selector bigger?

[Simon-Laux]

what are those .scss.kate-swp files like scss/._global.scss.kate-swp?

[Jikstra]

Can you re-add the emoji searchbar? And make the emoji category selector bigger?

Yup but not before we merged the other 2prs into this one. But why do you want to have a search bar for emojis? I don't really see the feature in it.

what are those .scss.kate-swp files like scss/._global.scss.kate-swp?

Temp files of the kate editor. Will remove them when we merged the other 2 prs into this one, otherwise things explode

[Jikstra]

This pr will make the messagelist a bit worse because we're not scrolling down anymore when we're reading a message. Didn't fix it yet because i would like to implement a new messagelist right away.

[Simon-Laux]

emoji search by text is useful, sometimes it is quicker to search via English text than looking for a specific emoji in all categories...
Other apps do the search differently over : + searchterm in the composer than they show a popup of the reults where you can choose the right one.

[r10s]

emoji search by text is useful, sometimes it is quicker to search via English text than looking for a specific emoji in all categories...
Other apps do the search differently over : + searchterm in the composer than they show a popup of the reults where you can choose the right one.

yip, it is useful for some users sometimes.

but i would also regard that as a power-feature we can target later. for now, the search bar stands in our way while refactoring the emoji/sticker-picker, so we decided to remove it for now.