TASInput: Let StickWidget and IRWidget shrink

Use `sizeHint` instead of `setMinimumSize` to increase the default size
of `StickWidget` and `IRWidget`.

0531286906 doubled the initial sizes of
`StickWidget` and `IRWidget`, but using `setMinimumSize` to do so
prevented users from shrinking the widgets manually.

Resolves bugs.dolphin-emu.org/issues/14019.

Source/Core/DolphinQt/TAS/IRWidget.cpp

@@ -20,7 +20,12 @@ IRWidget::IRWidget(QWidget* parent) : QWidget(parent)
                 "Right click to re-center it."));
 
   // If the widget gets too small, it will get deformed.
-  setMinimumSize(QSize(128, 96));
+  setMinimumSize(QSize(64, 48));
+}
+
+QSize IRWidget::sizeHint() const
+{
+  return QSize(128, 96);
 }
 
 void IRWidget::SetX(u16 x)

Source/Core/DolphinQt/TAS/IRWidget.h

@@ -13,6 +13,8 @@ class IRWidget : public QWidget
 public:
   explicit IRWidget(QWidget* parent);
 
+  QSize sizeHint() const override;
+
   static constexpr u16 IR_MIN_X = 0;
   static constexpr u16 IR_MIN_Y = 0;
   static constexpr u16 IR_MAX_X = 1023;

Source/Core/DolphinQt/TAS/StickWidget.cpp

@@ -21,7 +21,12 @@ StickWidget::StickWidget(QWidget* parent, u16 max_x, u16 max_y)
                 "Right click to re-center it."));
 
   // If the widget gets too small, it will get deformed.
-  setMinimumSize(QSize(128, 128));
+  setMinimumSize(QSize(64, 64));
+}
+
+QSize StickWidget::sizeHint() const
+{
+  return QSize(128, 128);
 }
 
 void StickWidget::SetX(u16 x)

Source/Core/DolphinQt/TAS/StickWidget.h

@@ -13,6 +13,8 @@ class StickWidget : public QWidget
 public:
   explicit StickWidget(QWidget* parent, u16 width, u16 height);
 
+  QSize sizeHint() const override;
+
 signals:
   void ChangedX(u16 x);
   void ChangedY(u16 y);