Use ILog.of(Class).error in IDEApplication version-file logger

Replaces the cross-bundle call to org.eclipse.ui.internal.ide.StatusUtil
.newError(...) in IDEApplication#writeVersion with ILog.of(IDEApplication
.class).error(message, throwable), and drops the now-unused StatusUtil
import.

Behavior changes:
- Plug-in id moves from "org.eclipse.ui.ide" (IDE_WORKBENCH constant in
  the called StatusUtil) to "org.eclipse.ui.ide.application", which is
  the bundle that actually emits the version-file write failure.
- The previous IDEWorkbenchPlugin.log(message, status) helper emitted
  two separate log entries (one for the message, one for the status);
  this now produces a single coherent entry whose status carries both
  the context message and the throwable, removing the dependency on the
  potentially-null e.getLocalizedMessage().

Author: vogella

bundles/org.eclipse.ui.ide.application/src/org/eclipse/ui/internal/ide/application/IDEApplication.java

@@ -36,6 +36,7 @@
 
 import org.eclipse.core.runtime.IConfigurationElement;
 import org.eclipse.core.runtime.IExecutableExtension;
+import org.eclipse.core.runtime.ILog;
 import org.eclipse.core.runtime.IProduct;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.OperationCanceledException;
@@ -74,7 +75,6 @@
 import org.eclipse.ui.internal.ide.IDEInternalPreferences;
 import org.eclipse.ui.internal.ide.IDEWorkbenchMessages;
 import org.eclipse.ui.internal.ide.IDEWorkbenchPlugin;
-import org.eclipse.ui.internal.ide.StatusUtil;
 import org.eclipse.ui.preferences.ScopedPreferenceStore;
 import org.osgi.framework.Bundle;
 import org.osgi.framework.Version;
@@ -838,8 +838,7 @@ private static void writeWorkspaceVersion() {
 		try (OutputStream output = new FileOutputStream(versionFile)) {
 			props.store(output, null);
 		} catch (IOException e) {
-			IDEWorkbenchPlugin.log("Could not write version file", //$NON-NLS-1$
-					StatusUtil.newError(e));
+			ILog.of(IDEApplication.class).error("Could not write version file", e); //$NON-NLS-1$
 		}
 	}