And use it to implement changing the run icon in the application output.
That implementation does only support the two run modes run and debug
for now. Further abstraction for more run modes to be done once needed.
Task-Nr: QTCREATORBUG-1232
By introducing the OutputFormatter, RunControls can influence the formatting
depening on the application started. A nice (and intended) side-effect is that
the QML runtime specific formatting will not interfere anymore with anything
else.