Qt: remove pad settings size constraint

This might fix some scrolling issues (or add more)

rpcs3/rpcs3qt/pad_settings_dialog.cpp

@@ -210,9 +210,6 @@ pad_settings_dialog::pad_settings_dialog(std::shared_ptr<gui_settings> gui_setti
 
 	// Resize in order to fit into our scroll area
 	ResizeDialog();
-
-	// Restrict out inner layout size. This is necessary because redrawing things will slow down the dialog otherwise.
-	ui->mainLayout->setSizeConstraint(QLayout::SizeConstraint::SetFixedSize);
 }
 
 pad_settings_dialog::~pad_settings_dialog()

rpcs3/rpcs3qt/pad_settings_dialog.ui

@@ -9,8 +9,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>866</width>
+    <width>500</width>
-    <height>715</height>
+    <height>380</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -37,8 +37,8 @@
        <rect>
         <x>0</x>
         <y>0</y>
-        <width>848</width>
+        <width>858</width>
-        <height>668</height>
+        <height>715</height>
        </rect>
       </property>
       <widget class="QWidget" name="tab">