DolphinQt: Size adjustments in **Breakpoints** widget based on selected debug font.

- Debug font is now used in the widget.
- Row height is now determined by the character height of the current
  font.
- A `OnDebugFontChanged()` slot has been connected to properly update
  the widget on debug font changes.

| Before | After |
| --- | --- |
| <img alt="Breakpoints widget (before)" title="Breakpoints widget (before)" src="https://github.com/user-attachments/assets/fdde293a-b1fd-4a1d-85e2-e16bc859eb9e" /> | <img alt="Breakpoints widget (after)" title="Breakpoints widget (after)" src="https://github.com/user-attachments/assets/cf4f1d59-c235-429b-bcb1-cae36065e805" /> |

Source/Core/DolphinQt/Debugger/BreakpointWidget.cpp

@@ -119,6 +119,8 @@ BreakpointWidget::BreakpointWidget(QWidget* parent)
   });
 
   connect(m_table, &QTableWidget::itemChanged, this, &BreakpointWidget::OnItemChanged);
+  connect(&Settings::Instance(), &Settings::DebugFontChanged, this,
+          &BreakpointWidget::OnDebugFontChanged);
 
   connect(&Settings::Instance(), &Settings::BreakpointsVisibilityChanged, this,
           [this](bool visible) { setHidden(!visible); });
@@ -160,6 +162,8 @@ void BreakpointWidget::CreateWidgets()
   m_table->setSelectionMode(QAbstractItemView::NoSelection);
   m_table->verticalHeader()->hide();
 
+  OnDebugFontChanged(Settings::Instance().GetDebugFont());
+
   connect(m_table, &QTableWidget::itemClicked, this, &BreakpointWidget::OnClicked);
   connect(m_table, &QTableWidget::customContextMenuRequested, this,
           &BreakpointWidget::OnContextMenu);
@@ -646,6 +650,13 @@ void BreakpointWidget::OnItemChanged(QTableWidgetItem* item)
   }
 }
 
+void BreakpointWidget::OnDebugFontChanged(const QFont& font)
+{
+  m_table->setFont(font);
+  m_table->verticalHeader()->setDefaultSectionSize(m_table->fontMetrics().height());
+  Update();
+}
+
 void BreakpointWidget::AddBP(u32 addr)
 {
   AddBP(addr, true, true, {});