Display tools should not be active until point Cloud is loaded

[monodo]

In case the user starts to play with the display tools (point colors, point scale, point transparency), undefined object error will be raised:

• geometry is no defined: for point color
• uniforms is not defined: for poitn scale and point transparency

Solution proposed:

• Do nothing, this is no major issue as it will be transparent to the user
• Lock the displaye tab untils points are loaded