suspendAutoSync method for CrudManager

[fabiojpoli]

Forum post

Replace the implementation bellow with a new suspendAutoSync method for CrudManager

// Suspend AjaxStore auto committing for the duration of the edit.
me.schedulerAutoCommit = taskStore.autoCommit;
taskStore.autoCommit   = false;
// Suspend Project auto syncing for the duration of the edit.
me.schedulerAutoSync       = scheduler.project.autoSync;
scheduler.project.autoSync = false;

[isglass]

We have suspendCrudAutoSync() and resumeCrudAutoSync(), but they are private. Discuss with @arcady-zherdev about making them public