Wrap quick fix invocations in a 'command'

Wrap quick fix invocations in a command to allow undo. This should have
been done by the IDE, but based on recent bug reports, it is not.

Fixes #160, #161

src/main/java/opwvhk/intellij/avro_idl/inspections/SimpleAvroIdlQuickFixOnPsiElement.java

@@ -4,6 +4,7 @@
 import com.intellij.codeInspection.LocalQuickFixAndIntentionActionOnPsiElement;
 import com.intellij.codeInspection.util.IntentionFamilyName;
 import com.intellij.codeInspection.util.IntentionName;
+import com.intellij.openapi.command.CommandProcessor;
 import com.intellij.openapi.editor.CaretState;
 import com.intellij.openapi.editor.Editor;
 import com.intellij.openapi.editor.LogicalPosition;
@@ -57,14 +58,16 @@ public boolean isAvailable(@NotNull Project project, @NotNull PsiFile file, @Not
 	@SuppressWarnings("unchecked")
 	public void invoke(@NotNull Project project, @NotNull PsiFile file, @NotNull PsiElement startElement,
 	                   @NotNull PsiElement endElement) {
-		invoke(project, file, (Editor) null, (E) startElement);
+		CommandProcessor.getInstance().executeCommand(project,
+				() -> invoke(project, file, (Editor) null, (E) startElement), text, null);
 	}
 
 	@Override
 	@SuppressWarnings("unchecked")
 	public void invoke(@NotNull Project project, @NotNull PsiFile file, @Nullable Editor editor,
 	                   @NotNull PsiElement startElement, @NotNull PsiElement endElement) {
-		invoke(project, file, editor, (E) startElement);
+		CommandProcessor.getInstance().executeCommand(project,
+				() -> invoke(project, file, editor, (E) startElement), text, null);
 	}
 
 	protected void selectElement(Editor editor, @NotNull PsiElement element) {