#44 Allow choosing where to search

[Sami Koivu]

The search screen could have a number of checkboxes which would determine in which all places the project-wide search would look it. Something like

|x| Constant pool
|x| Type (class, interface, enum, annotation definition) names
|x| Fields
|x| -names
|x| -signatures
|x| Methods
|x| -names
|x| -signatures
|x| Instructions
|x| -names
|x| -parameters
|x| Attributes