Slightly modify recently added warning messages

- The term 'scrubbing' is only used internally in code. The gui uses 'check & repair'
- The operations are running rather than pending

gnucash/gnome-utils/gnc-main-window.c

@@ -1148,7 +1148,7 @@ gnc_main_window_all_finish_pending (void)
     }
     if (gnc_gui_refresh_suspended ())
     {
-        gnc_warning_dialog (NULL, "%s", "An operation is still pending, wait for it to complete before quitting ");
+        gnc_warning_dialog (NULL, "%s", "An operation is still running, wait for it to complete before quitting.");
         return FALSE;
     }
     return TRUE;

gnucash/gnome/gnc-plugin-page-account-tree.c

@@ -425,7 +425,7 @@ finish (GncPluginPage* page)
 {
     if (gnc_get_ongoing_scrub ())
     {
-        gboolean ret = gnc_verify_dialog (GTK_WINDOW (gnc_plugin_page_get_window (GNC_PLUGIN_PAGE (page))), FALSE, _("A scrubbing operation is currently pending, do you want to abort it?"));
+        gboolean ret = gnc_verify_dialog (GTK_WINDOW (gnc_plugin_page_get_window (GNC_PLUGIN_PAGE (page))), FALSE, _("'Check & Repair' is currently running, do you want to abort it?"));
         if (ret)
         {
             gnc_set_abort_scrub (TRUE);

gnucash/gnome/gnc-plugin-page-register.c

@@ -1917,7 +1917,7 @@ finish_scrub (GncPluginPage* page)
 {
     if (is_scrubbing)
     {
-        gboolean ret = gnc_verify_dialog (GTK_WINDOW (gnc_plugin_page_get_window (GNC_PLUGIN_PAGE (page))), FALSE, _("A scrubbing operation is currently pending, do you want to abort it?"));
+        gboolean ret = gnc_verify_dialog (GTK_WINDOW (gnc_plugin_page_get_window (GNC_PLUGIN_PAGE (page))), FALSE, _("'Check & Repair' is currently running, do you want to abort it?"));
         if (ret)
         {
             abort_scrub = TRUE;