move blueprints out of the sidebar into Ctrl+C / Ctrl+V dialogs

src/test/BuildModeControllerTest.cpp

@@ -82,7 +82,7 @@ TEST_CASE("Only one mode is active at a time", "[buildmode]")
 TEST_CASE("Entering builder mode announces that blueprint mode ended", "[buildmode]")
 {
     // Regression: entering builder mode used to drop the blueprint silently, so the
-    // blueprint panel kept its button highlighted for a mode that was over.
+    // blueprint library kept tracking an active blueprint for a mode that was over.
     BuildModeController controller;
     controller.enterBlueprintMode(makeBlueprint());