Filters panel for TermPortal

FIlters panel should consist of 5 fields: 'Client', 'TermCollection', 'Process status', 'No term defined for language', 'Select an attribute'.

Attributes of type plaintext can be searched with wildcard (* and ? operators like in the current term search)

'Select an attribute' dropdown

User should be able to open the 'Select an attribute' dropdown and select some attribute, and that it should be added as 6th (7th and so on) field into filters panel. 

1.Those dynamically added filter fields can be of type text or combobox, depending on attribute type, defined for that attribute in the special database table

2. Possible options, available for selection within 'Select an attribute' dropdown are depending on values, selected in 'TermCollection' dropdown, but if nothing there - attributes dropdown should contain all possible attributes except 'Process status' attribute

'No term defined for language' dropdown

Additional drop-down with languages available in the termCollections to search for termEntries, where terms are not present in a certain language (current search language disabled)