Validate the input of the concentration field in the Sample

[diegoliberman]

When entering values such as 1e+30, there is a probability that the user enters an incorrect value. I have tested entering ijadsijdsidsj and the sample was saved without errors. When coming back to the sample it would show the concentration with a value of zero.

Let's at least validate that the allowed values are:

1. Any number
2. The letter e and the letter E
3. The plus sign +
4. The decimal separator .

If the user inputs any other character, we should show an error message informing an example of an acceptable value in the scientific notation.

We should also validate that:

1. There is only 1 consonant.
2. The consonant is followed by the plus sign
3. No negatives

[diegoliberman]

Bear in mind these validations should also be added when creating a box v2.

[sardar-usman]

@leandroradusky It is working as expected. Cc @diegoliberman