Network ID is not being displayed when adding a custom network
* Also replaced ModalPopup with StatusModal and other design
related updates (eg top margins etc) in NewCustomNetworkModal.qml
Closes#3456
There are some inconcistencies in the application when it comes to
button UI elements because we're using `StatusButton` in some places,
in other we use `StyledButton`. The latter is the original
component we've created when we started out building Status
Desktop, but is planned to be removed entirely in favour of
`StatusButton`.
This commit replaces the usages of `StyledButton` with `StatusButton`
Alexandra Betouni
Jonathan Rainville
Pascal Precht
Richard Ramos