fix(ui): show Drawings tab before Plates in EditNestForm

Users need to import a drawing first, so Drawings tab should be the
default landing tab to reduce steps.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

OpenNest/Forms/EditNestForm.Designer.cs

@@ -81,8 +81,8 @@
             // 
             // tabControl1
             // 
-            tabControl1.Controls.Add(tabPage1);
             tabControl1.Controls.Add(tabPage2);
+            tabControl1.Controls.Add(tabPage1);
             tabControl1.Dock = System.Windows.Forms.DockStyle.Fill;
             tabControl1.ItemSize = new System.Drawing.Size(100, 22);
             tabControl1.Location = new System.Drawing.Point(0, 0);