Locked captions shouldn't be translated

[adesz444]

There are some captions with the "Locked" property set to true, meaning it shouldn't be translated. It doesn't seem that the tool handles these captions. When imported it shows as a normal caption with "New" status. It would be nice if we can filter these out from the list.

Example:
Text000: Label '<Month Text>', Locked = true;

<trans-unit id="Table 591945447 - NamedType 2476940767" size-unit="char" translate="no" xml:space="preserve"> <source>&lt;Month Text&gt;</source> <note from="Developer" annotates="general" priority="2"></note> <note from="Xliff Generator" annotates="general" priority="3">Table XY - NamedType Text000</note> </trans-unit>