Clear highlights that are "touching" the cursor on change

This means that correcting a mistake won't wait until the request has resolved and that only the word at the end of the line will have it's spelling
highlight removed instead of the entire row

services/web/public/coffee/ide/editor/directives/aceEditor/spell-check/HighlightedWordManager.coffee

@@ -67,3 +67,24 @@ define [
 				highlightRow > end.row or
 				(highlightRow == end.row and highlightStartColumn >= end.column)
 			!(highlightIsAllBeforeRange or highlightIsAllAfterRange)
+
+		clearHighlightTouchingRange: (range) ->
+			highlight = @highlights.find (hl) =>
+				@_doesHighlightTouchRange hl, range.start, range.end
+			if highlight
+				@removeHighlight highlight
+
+		_doesHighlightTouchRange: (highlight, start, end) ->
+			highlightRow = highlight.range.start.row
+			highlightStartColumn = highlight.range.start.column
+			highlightEndColumn = highlight.range.end.column
+
+			rangeStartIsWithinHighlight =
+				highlightStartColumn <= start.column and
+				highlightEndColumn >= start.column
+			rangeEndIsWithinHighlight =
+				highlightStartColumn <= end.column and
+				highlightEndColumn >= end.column
+
+			highlightRow == start.row and
+				(rangeStartIsWithinHighlight or rangeEndIsWithinHighlight)

services/web/public/coffee/ide/editor/directives/aceEditor/spell-check/SpellCheckManager.coffee

@@ -35,6 +35,9 @@ define [], () ->
 		onChange: (e) =>
 			if @isSpellCheckEnabled()
 				@markLinesAsUpdated(@adapter.normalizeChangeEvent(e))
+
+				@adapter.wordManager.clearHighlightTouchingRange(e)
+
 				@runSpellCheckSoon()
 
 		onSessionChange: () =>