Warning message for Mentees, apply to Mentors with 0 slots

[dilankavishka]

Is your feature request related to a problem? Please describe.
Display a warning message to mentees, when they try to apply for mentors who are with zero(no available) slots.

Expected warning message: "This mentor currently has no available slots"

[KavinduGama]

Hi,
Can I try to work on this one ?

@dilankavishka @anjula-sack

[anjula-sack]

sure go ahead @KavinduGama

[anjula-sack]

Any updates @KavinduGama?