Statemanager is not persisting Form on page reload, when using sessionStorage

[Bulebu]

I think this was mentioned before, but in my opinion it's still a bug.

When u reload ur page while using sessionStorage the ngForms object is always empty and getNgForm will always return null.
And that's because

akita-ng-forms-manager/projects/datorama/akita-ng-forms-manager/src/lib/forms-manager.ts

Line 128 in f9684b8

if (this.hasForm(formName) === true) {

evaluates to true, since there is initial data in the session storage and

akita-ng-forms-manager/projects/datorama/akita-ng-forms-manager/src/lib/forms-manager.ts

Lines 132 to 138 in f9684b8

	} else {
	/** else update the store with the current form state */
	this.updateStore(formName, form, true);
	if (merged.persistForm) {
	this.storeFormInstance(formName, form);
	}
	}

is never reached.

Maybe changing it to something like
if(!this.ngForms[formName]) { this.storeFormInstance(formName, form); }

might fix that issue.

Cheers,
Kristof