Add space between widgets in left side panel. Closes #7224.

src/gui/categoryfilterwidget.cpp

@@ -168,7 +168,12 @@ void CategoryFilterWidget::callUpdateGeometry()
 
 QSize CategoryFilterWidget::sizeHint() const
 {
-    return viewportSizeHint();
+    return {
+        // Width should be exactly the width of the content
+        sizeHintForColumn(0),
+        // Height should be exactly the height of the content
+        static_cast<int>(sizeHintForRow(0) * (model()->rowCount() + 0.5)),
+    };
 }
 
 QSize CategoryFilterWidget::minimumSizeHint() const

src/gui/tagfilterwidget.cpp

@@ -156,7 +156,12 @@ void TagFilterWidget::callUpdateGeometry()
 
 QSize TagFilterWidget::sizeHint() const
 {
-    return viewportSizeHint();
+    return {
+        // Width should be exactly the width of the content
+        sizeHintForColumn(0),
+        // Height should be exactly the height of the content
+        static_cast<int>(sizeHintForRow(0) * (model()->rowCount() + 0.5)),
+    };
 }
 
 QSize TagFilterWidget::minimumSizeHint() const

src/gui/transferlistfilterswidget.cpp

@@ -89,12 +89,12 @@ FiltersBase::FiltersBase(QWidget *parent, TransferListWidget *transferList)
 
 QSize FiltersBase::sizeHint() const
 {
-    QSize size;
-    // Height should be exactly the height of the content
-    size.setHeight(((sizeHintForRow(0) + 2 * spacing()) * (count() + 0.5)));
-    // Width should be exactly the width of the content
-    size.setWidth(sizeHintForColumn(0));
-    return size;
+    return {
+        // Width should be exactly the width of the content
+        sizeHintForColumn(0),
+        // Height should be exactly the height of the content
+        static_cast<int>((sizeHintForRow(0) + 2 * spacing()) * (count() + 0.5)),
+    };
 }
 
 QSize FiltersBase::minimumSizeHint() const