Property autocomplete insertion bug

[mickaelistria]

From AObuchow/lsp4xml-extensions-maven#21

When trying to get autocomplete for properties, I seem to have to type in a character that's part of the completion (eg {) to get the autocompletions to appear. However when inserting, the typed in { doesn't get removed/accounted for, resulting in incorrect syntax.

For property autocomplete (and possibly other completions), we should take into account what the user has already written and possible replace or modify the existing text using the selected completion.

Demo: https://photos.app.goo.gl/vXVLBM8AdcmD4Qz48

[AObuchow]

This might have been fixed in 3585971 but it needs to be verified.

[mickaelistria]

I think it's not really a bug. There is no compelling reason to assume a simple { is to be interpreted as ${ in general. I tried a bit and didn't spot any oddity with property insertion, so let's close.