LibGUI: Remove has_visible_list members from TextEditor

This was a kludge to paint ComboBox editors before the advent of
accessory windows, isn't being used anymore, and was inadvertently
letting two ComboBoxes paint as if both had focus.

Userland/Libraries/LibGUI/ComboBox.cpp

@@ -251,7 +251,6 @@ void ComboBox::open()
     Gfx::IntRect list_window_rect { my_screen_rect.bottom_left(), size };
     list_window_rect.intersect(Desktop::the().rect().shrunken(0, taskbar_height + menubar_height + offset));
 
-    m_editor->set_has_visible_list(true);
     m_editor->set_focus(true);
     if (m_selected_index.has_value()) {
         // Don't set m_updating_model to true here because we only want to
@@ -272,8 +271,6 @@ void ComboBox::open()
 void ComboBox::close()
 {
     m_list_window->hide();
-    m_editor->set_has_visible_list(false);
-    m_editor->set_focus(true);
 }
 
 String ComboBox::text() const

Userland/Libraries/LibGUI/TextEditor.cpp

@@ -400,7 +400,7 @@ void TextEditor::paint_event(PaintEvent& event)
     painter.add_clip_rect(event.rect());
     painter.fill_rect(event.rect(), widget_background_color);
 
-    if (is_displayonly() && (is_focused() || has_visible_list())) {
+    if (is_displayonly() && is_focused()) {
         widget_background_color = palette().selection();
         Gfx::IntRect display_rect {
             widget_inner_rect().x() + 1,
@@ -502,12 +502,12 @@ void TextEditor::paint_event(PaintEvent& event)
             } else if (!document().has_spans()) {
                 // Fast-path for plain text
                 auto color = palette().color(is_enabled() ? foreground_role() : Gfx::ColorRole::DisabledText);
-                if (is_displayonly() && (is_focused() || has_visible_list()))
+                if (is_displayonly() && is_focused())
                     color = palette().color(is_enabled() ? Gfx::ColorRole::SelectionText : Gfx::ColorRole::DisabledText);
                 painter.draw_text(visual_line_rect, visual_line_text, m_text_alignment, color);
             } else {
                 auto unspanned_color = palette().color(is_enabled() ? foreground_role() : Gfx::ColorRole::DisabledText);
-                if (is_displayonly() && (is_focused() || has_visible_list()))
+                if (is_displayonly() && is_focused())
                     unspanned_color = palette().color(is_enabled() ? Gfx::ColorRole::SelectionText : Gfx::ColorRole::DisabledText);
                 RefPtr<Gfx::Font> unspanned_font = this->font();
 
@@ -1375,13 +1375,6 @@ void TextEditor::set_mode(const Mode mode)
         set_override_cursor(Gfx::StandardCursor::None);
 }
 
-void TextEditor::set_has_visible_list(bool visible)
-{
-    if (m_has_visible_list == visible)
-        return;
-    m_has_visible_list = visible;
-}
-
 void TextEditor::did_update_selection()
 {
     m_cut_action->set_enabled(is_editable() && has_selection());

Userland/Libraries/LibGUI/TextEditor.h

@@ -81,9 +81,6 @@ public:
     void set_visualize_trailing_whitespace(bool);
     bool visualize_trailing_whitespace() const { return m_visualize_trailing_whitespace; }
 
-    bool has_visible_list() const { return m_has_visible_list; }
-    void set_has_visible_list(bool);
-
     virtual bool is_automatic_indentation_enabled() const final { return m_automatic_indentation_enabled; }
     void set_automatic_indentation_enabled(bool enabled) { m_automatic_indentation_enabled = enabled; }
 
@@ -320,7 +317,6 @@ private:
     bool m_has_pending_change_notification { false };
     bool m_automatic_indentation_enabled { false };
     WrappingMode m_wrapping_mode { WrappingMode::NoWrap };
-    bool m_has_visible_list { false };
     bool m_visualize_trailing_whitespace { true };
     int m_line_spacing { 4 };
     size_t m_soft_tab_width { 4 };