Labeled inputs - ability to set label's position (left or right)

[jchojna]

Could we allow user to set the label's position easily - so it can be set either on the left or right side of the actual input? I found it hard to customize in css using input's selector. Additionally, I didn't find fomantic class allowing to reverse the order, so maybe adding this functionality could help shiny.semantic to stand out more comparing to our competition?

[dokato]

On that, I also noticed a small inconsistency. Some of our components have label inside their semantic version, some only in shiny version. I think we should keep that consistent, eg. shiny-like function have label, similarly to their shiny equvalent, whereas semantic do not, allowing for greater flexibility like you mentioned above, eg. positioning label however you like.

[dokato]

The task consists of a few steps:

• normalise how the label is added between the various inputs that use it (note that eg. label of a button it is what is displayed on the button, here we speak about the label that is around the actual input, eg. text above);

• come up with a solution to customise the label, eg. look at the Fomantic options here: https://fomantic-ui.com/elements/label.html. One idea is to insert default label when only text provided (eg. label = "My Label") and insert customised label when a list (label = list(content = "My Label", position = "top", ...) )