fix #448: } motion behaves differently in visual mode

I traced the problem in the issue #448 to this method in `ImprovedParagraphProvider` in the improved paragraph plugin: 

    @Override
    protected State<Command> visualModeBindings() {
        return new VisualMotionState(Motion2VMC.CHARWISE, ImprovedParagraphMotion.PARAGRAPH_MOTIONS);
    } 

Changing `Motion2VMC.CHARWISE` for `Motion2VMC.LINEWISE` seems to fix the problem. It makes sense to me since the paragraph motion sounds more like a linewise motion.

I am working on a test but, for some reason I cannot make it fail:

    @Test
    public void testParagrapForwardMotionLineWise() throws CommandExecutionException {
	    Motion oneParagraphForward = ImprovedParagraphMotion.FORWARD;
	    adaptor.changeMode(LinewiseVisualMode.NAME);
	    assertEquals(LinewiseVisualMode.NAME, adaptor.getCurrentModeName());
        checkMotion(oneParagraphForward,
	            "",'1',"\n"+
	            "\n"+
	            "2\n"+
	            "\n"+
	            "3\n",
	            
	            "1\n",
	            '\n',
	            "2\n"+
	            "\n"+
	            "3\n"
        );
        reloadEditorAdaptor();
    }