FIX: Bitmap controls are centered manually

[vhosouza]

Due to issue on MacOS, the navigation control buttons had the bitmap images left aligned.

To fix, the images are drawn manually.

Also removed legacy code related to the navigation controls.

KNOWN ISSUE:
For the tractography and serial_trigger buttons, if they were never activated, they get activated after the navigation is turned on and off. This should be fixed before merging.

[vhosouza]

@rmatsuda, @henrikkauppi, @Rakhesis this PR is OS sensitive. Please test them in Windows and Linux.

Also, if you have a solution to the issue I raised, please commit it here or discuss with me.

[rmatsuda]

Its not working properly in windows. The icons are not indicating if there are disable to click, ie. keeps the same apparence always.

[henrikkauppi]

The icons are centered on the buttons but as mentioned by Renan, on Windows some of the disabled buttons are red when they should be gray, and even those disabled buttons that appear gray, their icons are black instead of darker shade of gray.

To illustrate this, this is what the buttons normally look like on Windows before coregistration:

And this is what they look like now before coregistration:

[Rakhesis]

Bugs on Windows:

• Serial pulse checkbox shows red, functionally acts as if the button is disabled
• Starting navigation enables tractography checkbox when no FOD loaded.

[Rakhesis]

On Linux, buttons seems to work the same as on Windows.

I found the same bugs that me, @henrikkauppi and @rmatsuda have already described in the comments above for Windows.