don't fix cursor at the beginning on web (#128)

Author: eagleoflqj

src/rimeengine.h

@@ -88,7 +88,7 @@ FCITX_CONFIGURATION(
     Option<bool> preeditCursorPositionAtBeginning{
         this, "PreeditCursorPositionAtBeginning",
         _("Fix embedded preedit cursor at the beginning of the preedit"),
-        !isAndroid() && !isApple()};
+        !isAndroid() && !isApple() && !isEmscripten()};
     OptionWithAnnotation<SwitchInputMethodBehavior,
                          SwitchInputMethodBehaviorI18NAnnotation>
         switchInputMethodBehavior{