Bug 139063 [Field Assist] - API - behavior of text insert not taking selection into account
Field Assist Example - set acceptance style to "Insert into field content" - type some text into the text and combo - select a subset of the text and invoke content assist - choose a proposal in the popup outcome: text is inserted at the insertion point expected: text should be inserted, but should replace any selected text Is this a regression?
bundles/org.eclipse.jface/src/org/eclipse/jface/fieldassist/ContentProposalAdapter.java
super(control.getShell(), SWT.RESIZE | SWT.ON_TOP, false, false,
					false, false, null, infoText);
			this.proposals = proposals;
		}
		/*
		 * Overridden to force change of colors. See
		 * https://bugs.eclipse.org/bugs/show_bug.cgi?id=136244 (non-Javadoc)
		 * 
		 * @see org.eclipse.jface.dialogs.PopupDialog#createContents(org.eclipse.swt.widgets.Composite)
		 */
		protected Control createContents(Composite parent) {
			Control contents = super.createContents(parent);
			changeDefaultColors(parent);
			return contents;
		}
		/*
		 * Set the colors of the popup. The contents have already been created.
		 */
		private void changeDefaultColors(Control control) {
			applyForegroundColor(getShell().getDisplay().getSystemColor(
					SWT.COLOR_LIST_FOREGROUND), control);
			applyBackgroundColor(getShell().getDisplay().getSystemColor(
					SWT.COLOR_LIST_BACKGROUND), control);
		}
		/*
		 * Creates the content area for the proposal popup. This creates a table
		 * and places it inside the composite. The table will contain a list of
		 * all the proposals.