Implement simpler fix for emote completion bug

This commit implements a simpler fix for the problem described in #1209.
The setting's signal is connected to a reset of `completionInProgress_`
so that the completion model is updated on the next word already.

This commit also removes the older approach tackling this issue.

src/widgets/settingspages/GeneralPage.cpp

@@ -8,12 +8,10 @@
 #include "singletons/Fonts.hpp"
 #include "singletons/Paths.hpp"
 #include "singletons/Theme.hpp"
+#include "singletons/WindowManager.hpp"
 #include "util/FuzzyConvert.hpp"
 #include "util/Helpers.hpp"
-#include "widgets/Notebook.hpp"
-#include "widgets/Window.hpp"
 #include "widgets/helper/Line.hpp"
-#include "widgets/splits/Split.hpp"
 
 #define CHROME_EXTENSION_LINK                                           \
     "https://chrome.google.com/webstore/detail/chatterino-native-host/" \
@@ -286,22 +284,10 @@ void GeneralPage::initLayout(SettingsLayout &layout)
         [](int index) { return index; }, [](auto args) { return args.index; },
         false);
 
-    auto emoteCompletionCheckbox = layout.addCheckbox(
+    layout.addCheckbox(
         "Only search for emote autocompletion at the start of emote names",
         s.prefixOnlyEmoteCompletion);
 
-    // Get the currently active split
-    // XXX: Is there a better way to do this?
-    auto selectedSplit =
-        static_cast<SplitContainer *>(
-            getApp()->windows->getMainWindow().getNotebook().getSelectedPage())
-            ->getBaseNode()
-            ->getSplit();
-
-    // Update emote completion mode when checkbox state is changed
-    QObject::connect(emoteCompletionCheckbox, &QCheckBox::stateChanged,
-                     selectedSplit, &Split::updateEmoteCompletion);
-
     layout.addSpacing(16);
     layout.addSeperator();