Currently if you define a filter as text then you get this by default:

90% of the time if you want to use that filter you are likely to want a 'Contains' filter:

Using the Contains filter with an empty value is exactly equivalent to 'Is any value', but it saves you two clicks when using the report. It saves even more when you don't know which filter you want to filter on (which is also why we also want MDL-80379)

So I'm proposing

• that all text filters default to Contains
• the filter is not considered to have a filter if the field is empty
• when the field is filled in then you are considered to have a filter
• the 'Is any value' option is removed