VcsBase: Add a button to reset VCS information cache

Task-number: QTCREATORBUG-14454
Change-Id: I958f58b8b19a8a9453e869daaf0a25ccf6fe57b3
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@theqtcompany.com>
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/vcsbase/commonsettingspage.cpp

@@ -65,6 +65,8 @@ CommonSettingsWidget::CommonSettingsWidget(QWidget *parent) :
 
     connect(Core::VcsManager::instance(), &Core::VcsManager::configurationChanged,
             this, &CommonSettingsWidget::updatePath);
+    connect(m_ui->cacheResetButton, &QPushButton::clicked,
+            this, [] { Core::VcsManager::clearVersionControlCache(); });
 }
 
 CommonSettingsWidget::~CommonSettingsWidget()