Set more reasonable size along with setting a minimumSize property

Author: matthewyang204

src/NotepadNext/dialogs/FindReplaceDialog.ui

@@ -6,10 +6,16 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>614</width>
-    <height>440</height>
+    <width>600</width>
+    <height>350</height>
    </rect>
   </property>
+  <property name="minimumSize">
+    <size>
+      <width>600</width>
+      <height>350</height>
+    </size>
+  </property>
   <property name="windowTitle">
    <string>Find</string>
   </property>