Feature/300 pyblish pype toggle instance family

[iLLiCiTiT]

Changes

• group in instance view is split into 2 parts
  
  • click on expand button collapse or expand the group
  • click on label uncheck all instances in if there is at least one checked instance otherwise check all of them

Resolves: #300

[hound]

Some files could not be reviewed due to errors:

./pype/tools/pyblish_pype/model.py:969:34: B008: Do not perform function call...

./pype/tools/pyblish_pype/model.py:969:34: B008: Do not perform function calls in argument defaults.  The call is performed only once at function definition time. All calls to your function will reuse the result of that definition-time function call.  If this is intended, assign the function call to a module-level variable and use that variable as a default value.
./pype/tools/pyblish_pype/model.py:973:31: B008: Do not perform function calls in argument defaults.  The call is performed only once at function definition time. All calls to your function will reuse the result of that definition-time function call.  If this is intended, assign the function call to a module-level variable and use that variable as a default value.
./pype/tools/pyblish_pype/model.py:998:41: B008: Do not perform function calls in argument defaults.  The call is performed only once at function definition time. All calls to your function will reuse the result of that definition-time function call.  If this is intended, assign the function call to a module-level variable and use that variable as a default value.

[hound]

Some files could not be reviewed due to errors:

./pype/tools/pyblish_pype/model.py:969:34: B008: Do not perform function call...

./pype/tools/pyblish_pype/model.py:969:34: B008: Do not perform function calls in argument defaults.  The call is performed only once at function definition time. All calls to your function will reuse the result of that definition-time function call.  If this is intended, assign the function call to a module-level variable and use that variable as a default value.
./pype/tools/pyblish_pype/model.py:973:31: B008: Do not perform function calls in argument defaults.  The call is performed only once at function definition time. All calls to your function will reuse the result of that definition-time function call.  If this is intended, assign the function call to a module-level variable and use that variable as a default value.
./pype/tools/pyblish_pype/model.py:998:41: B008: Do not perform function calls in argument defaults.  The call is performed only once at function definition time. All calls to your function will reuse the result of that definition-time function call.  If this is intended, assign the function call to a module-level variable and use that variable as a default value.

[tokejepsen]

Nice!