Move ComboBoxTableCellRenderer from util to platform-impl

There is no need to store this class in util,
and there are no external usages.

platform/platform-impl/src/com/intellij/ui/ComboBoxTableCellRenderer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2013 JetBrains s.r.o.
+ * Copyright 2000-2017 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package com.intellij.util.ui;
+package com.intellij.ui;
 
 import com.intellij.openapi.diagnostic.LogUtil;
 import com.intellij.openapi.diagnostic.Logger;

plugins/cvs/cvs-plugin/src/com/intellij/cvsSupport2/cvsoperations/cvsAdd/ui/AddMultipleFilesOptionsDialog.java

@@ -33,7 +33,7 @@ import com.intellij.ui.treeStructure.treetable.TreeTable;
 import com.intellij.ui.treeStructure.treetable.TreeTableModel;
 import com.intellij.ui.treeStructure.treetable.TreeTableTree;
 import com.intellij.util.ui.ColumnInfo;
-import com.intellij.util.ui.ComboBoxTableCellRenderer;
+import com.intellij.ui.ComboBoxTableCellRenderer;
 import com.intellij.util.ui.table.ComboBoxTableCellEditor;
 import com.intellij.util.ui.tree.TreeUtil;
 import org.netbeans.lib.cvsclient.command.KeywordSubstitution;

plugins/git4idea/src/git4idea/rebase/GitRebaseEditor.java

@@ -35,7 +35,6 @@ import com.intellij.util.ArrayUtil;
 import com.intellij.util.ListWithSelection;
 import com.intellij.util.PairFunction;
 import com.intellij.util.containers.ContainerUtil;
-import com.intellij.util.ui.ComboBoxTableCellRenderer;
 import com.intellij.util.ui.EditableModel;
 import com.intellij.util.ui.JBUI;
 import com.intellij.util.ui.UIUtil;