title: x-axis name is outside bokeh figure
body: <p>I have build a barchart in Bokeh but have the problem that the name on the left-most side of the x-axis is outside the figure. My code looks like this:</p>
  
  <pre><code>source2 = ColumnDataSource(data=dict(district=df2.district,
                                     areaRatio=df2.areaRatio,                                   areaRatioStr=round(df2.areaRatio,0)))
  
  # Figure
  p2 = figure(x_range=df2.district,plot_height=300,plot_width=500,
             y_range= ranges.Range1d(start=0,end=1800),
             title="Trees pr. km²")
  
  # Bar chart
  p2.vbar(x='district',top='areaRatio',source = df2,width=0.9,color='green')
  
  # remove the grid
  p2.xgrid.grid_line_color=None
  p2.ygrid.grid_line_color=None
  # Make sure bars stat at 0
  p2.y_range.start = 0
  # Turn the x-labels
  p2.xaxis.major_label_orientation = 0.5
  # remove - y-axis
  p2.yaxis.visible = False
  # Remove the toolbar
  p2.toolbar_location=None
  # Remove the grey box around the plot
  p2.outline_line_color = None
  
  # add labels
  labels2 = LabelSet(x='district', y='areaRatio', text='areaRatioStr', level='glyph',
                    x_offset=-20, y_offset=0, source=source2, render_mode='canvas',
                    text_font_size="14pt")
  
  # add hover tool
  p2.add_tools(HoverTool(tooltips = [('Trees pr. km²','@areaRatio{0.0}')]))
  p2.add_layout(labels2)
  show(p2)
  </code></pre>
  
  <p>In the figure below the left bar is suppose to have the name 'Amager Vest' but at the moment only 'er Vest' is visible.</p>
  
  <p><a href="https://i.stack.imgur.com/NBCQw.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/NBCQw.png" alt="enter image description here"></a></p>