Handle key-value pairs pasted as tags

[AndreasHae]

Implements the behaviour requested in #5024

When a user pastes a string like 'key=value' into the raw tag editor, it gets split into key and value.

[tordans]

@AndreasHae thanks for this!
I wonder …

• will this also "submit" the tag or just pre-fill the fields. In later case, the user still has to press enter? Advantage auf auto-submitting is, that the UI shows more details like the (i) icon next to the key-value-pair.
• where will the cursor/focus be after splitting? Eg at the end of the value-field?
• what happens if the copied text has new linkes (update 2018-4-16: I meant "new lines", sorry) in it?, eg

key1=value1
key2=value2

(I don't have a dev-environment to test this myself, so I need to ask this way…)

[AndreasHae]

@tordans
The tag gets split as soon as the input field loses focus. I am not quite sure what you mean by the other two points, but hopefully this GIF explains the functionality better:

[bhousel]

Thanks @AndreasHae! I just tried it out and it works great. Hope people find it useful 👍