REGRESSION(266664@main): Reversion bubble does not appear when marker…

… placed at end of autocorrected word

https://bugs.webkit.org/show_bug.cgi?id=259949

Reviewed by Megan Gardner.

The bug was caused by clearing of m_rangeWithAlternative in startAlternativeTextUITimer.
Just clear the timer instead.

* Source/WebCore/editing/AlternativeTextController.cpp:
(WebCore::AlternativeTextController::startAlternativeTextUITimer):

Canonical link: https://commits.webkit.org/266707@main

Source/WebCore/editing/AlternativeTextController.cpp

@@ -113,7 +113,8 @@ void AlternativeTextController::startAlternativeTextUITimer(AlternativeTextType
     if (type == AlternativeTextType::Correction)
         m_rangeWithAlternative = std::nullopt;
     m_type = type;
-    stopAlternativeTextUITimer();
+    if (m_timer)
+        m_document.eventLoop().cancelScheduledTask(m_timer);
     m_timer = m_document.eventLoop().scheduleTask(correctionPanelTimerInterval, TaskSource::UserInteraction, [weakThis = WeakPtr { *this }] {
         if (!weakThis)
             return;