Gerrit: Factor out remote server chooser

Preparing for re-use in Push to Gerrit dialog.

Task-number: QTCREATORBUG-16367
Change-Id: Ic72f72024d6b6b5a525f6855a9947d4c2dc6de48
Reviewed-by: André Hartmann <aha_1980@gmx.de>

src/plugins/git/git.qbs

@@ -93,6 +93,8 @@ QtcPlugin {
             "gerritparameters.h",
             "gerritplugin.cpp",
             "gerritplugin.h",
+            "gerritremotechooser.cpp",
+            "gerritremotechooser.h",
             "gerritserver.cpp",
             "gerritserver.h",
             "gerritpushdialog.cpp",