feat: show warning before blocking followed channel (#5615)

src/widgets/DraggablePopup.cpp

@@ -41,6 +41,7 @@ DraggablePopup::DraggablePopup(bool closeAutomatically, QWidget *parent)
               BaseWindow::ClearBuffersOnDpiChange,
           parent)
     , lifetimeHack_(std::make_shared<bool>(false))
+    , closeAutomatically_(closeAutomatically)
     , dragTimer_(this)
 
 {
@@ -128,4 +129,14 @@ Button *DraggablePopup::createPinButton()
     return this->pinButton_;
 }
 
+bool DraggablePopup::ensurePinned()
+{
+    if (this->closeAutomatically_ && !this->isPinned_)
+    {
+        this->togglePinned();
+        return true;
+    }
+    return false;
+}
+
 }  // namespace chatterino