Replace remaining legitimate usages with [Keyed]DialogProviders.
Remove the DialogManager itself, all the getters for it, all the places keeping
references around to it, all the dialogs taking it in the constructor, and all
the partridges in pear trees that had one hidden away.
Change-Id: I0a1234960a4e08c0a7c6afc08a5432102b17c125
Reviewed-on: http://gerrit.dmdirc.com/3048
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Mass singleton removal spree. Minor tidying in edited classes.
This tidying introduces a DialogManager class which ensures only a
single instance of a dialog can exist at any one time. This will be
expanded in the future to support management of all dialogs.
Change-Id: I506d7dde623628e38fddcd5f81221d9f2cc832ca
Reviewed-on: http://gerrit.dmdirc.com/2246
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>