Fix paste in the HTML backend.

Author: treeform

src/fidget/dom2.nim

@@ -1591,6 +1591,7 @@ proc now*(p: Performance): float
 proc removeAllRanges*(s: Selection)
 proc deleteFromDocument*(s: Selection)
 proc getRangeAt*(s: Selection, index: int): Range
+proc collapse*(s: Selection)
 converter toString*(s: Selection): cstring
 proc `$`*(s: Selection): string = $(s.toString())
 

src/fidget/htmlbackend.nim

@@ -600,6 +600,7 @@ proc startFidget*(draw: proc(), load: proc() = nil, w = 0, h = 0) =
     if selection.rangeCount == 0:
       return
     selection.getRangeAt(0).insertNode(document.createTextNode(paste))
+    selection.collapse()
     ev.preventDefault()
     keyboard.input = $document.activeElement.innerText
     echo "keyboard.input"