Restructure view module into ui folder, graph specific widgets into graph subfolder

src/ui/graph/mod.rs

@@ -0,0 +1,24 @@
+// Copyright 2021 Tom A. Wagner <tom.a.wagner@protonmail.com>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License version 3 as published by
+// the Free Software Foundation.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+// SPDX-License-Identifier: GPL-3.0-only
+
+mod graph_view;
+pub use graph_view::*;
+mod node;
+pub use node::*;
+mod port;
+pub use port::*;
+mod zoomentry;
+pub use zoomentry::*;