Feature/bootstrap tabs

[bmlancien]

Now you can:

• add the classes error or warning to the li items with the nav-item classes. The error class will display a red color and warning a brown color. I did two classes in the case there would not be any error but only warnings. If it's too complicated to implement, just use the error class, it's totally fine for me.
• remove the disabled class from the refresh buttons when they need to be active. It should switch from grey and not active and clickable to green and clickable.

PS: I didn't merge the main branch since there was some conflicts, so I'd rather let you solve them.

[bmlancien]

@henhuy

• You should be able to use the "update" class on the refresh buttons
• There was already some css styling for the error and warning classes on the nav-item containers (not nav-link). Since I don't know which element you are targeting, I commented out a part of the code (see _graphs.scss) in order to target nav-link instead. But if it's nav-item, you can replace it with the right code (but you need to compile the scss into css...).
• You mentioned the plural form for the css classes, so I changed them into errors, warnings and I now added an infos class as well.

[henhuy]

Thanks @bmlancien. Error and warnings are working now. But for refresh button I get some unintended behavior, as sometimes button gets disabled (though I don't see disabled flag). Steps to reproduce:

• Choose scenario
• click on refresh
• now I cannot refresh once more (but this should always be possible! as sometimes Refresh class is not updated for strange reasons)

Could you fix/check one more time, @bmlancien ? sorry

[bmlancien]

@henhuy Do you want to keep using the .update class for the refresh buttons if they will always be displayed in green anyway?