..opibuilder.widgets.extra: adding the service button

Change-Id: Id91e7c5f477d98fe06240a174131c4011d3e3a45
..ServiceMethodWidget: fixing the layout and the dialog resize.

Change-Id: I3700f4353b3b86850d5aa80ed8905feec5d380da
..ServiceMethod: adding editing support, initialize dialog correctly.

Change-Id: Iea48550ca621a96427299b2977c4cfd09467aac1
..ServiceButton: creating a new button widget for service method

Change-Id: Idbb389fbcee38d2708fe50a256b5297cd2338d79
..ui.toolbar: creating a separate reusable widget for service tree

Change-Id: Iddca6f7c8d060ad4336fecfad20a8f07ae6e9159
..opibuilder.widgets.extra: adding service search dialog for the
serviceMethodProperty widget

Change-Id: Ie063aebcf9cf36242988f5fc59a6322ea1d4ae01
Merge branch '3.2.x' of ssh://git@github.com/ControlSystemStudio/cs-studio.git into 3.2.x