fix regression in json selection page; remove update flag

The update flag is to be replaced by a time based setting together with
the other options

Author: jan

io.sloeber.ui/src/io/sloeber/ui/JsonMultiLineTextFieldEditor.java

@@ -0,0 +1,51 @@
+package io.sloeber.ui;
+
+import org.eclipse.cdt.core.parser.util.StringUtil;
+import org.eclipse.cdt.ui.newui.MultiLineTextFieldEditor;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.layout.GridData;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Text;
+
+
+/**
+ * A class to change MultiLineTextFieldEditor so it puts the label on top of the
+ * text field and the text field expands bot horizontal and verical
+ * Note I needed a FLAT parent FieldEditorPreferencePage (GRID did not work)
+ * 	public ThirdPartyHardwareSelectionPage() {
+ *		super(org.eclipse.jface.preference.FieldEditorPreferencePage.FLAT);
+ */
+public class JsonMultiLineTextFieldEditor extends MultiLineTextFieldEditor{
+
+	public JsonMultiLineTextFieldEditor(String name, String labelText, int width, int strategy, Composite parent)  {
+		super( name,  labelText,  width,strategy,  parent);
+	}
+
+	/**
+	 * I want 1 column
+	 */
+	@Override
+	public int getNumberOfControls() {
+		return 1;
+	}
+
+
+	/**
+	 * I want a GridData that has horizontal fill
+	 */
+	@Override
+	protected void doFillIntoGrid(Composite parent, int numColumns) {
+		super.doFillIntoGrid( parent,  numColumns) ;
+
+		Text textField = getTextControl(parent);
+		textField.setLayoutData( new GridData(SWT.FILL,SWT.BEGINNING,true,false));
+
+	}
+
+	public void setText(String[] text) {
+		String actualText=StringUtil.join(text, System.lineSeparator());
+		getPreferenceStore().setValue(getPreferenceName(), actualText);
+		setStringValue(actualText );
+	}
+
+}