[PD] fix pad/pocket direction issue

- the info if a custom direction is used, was incorrectly determined by checking a checkbox that only displays the vector value, no matter if it is a custom vector or not

src/Mod/PartDesign/Gui/TaskPadParameters.cpp

@@ -640,7 +640,8 @@ bool   TaskPadParameters::getAlongSketchNormal(void) const
 
 bool   TaskPadParameters::getCustom(void) const
 {
-    return ui->checkBoxDirection->isChecked();
+    // index 2 is hardcoded to custom vector
+    return ui->directionCB->currentIndex() == 2 ? true : false;
 }
 
 std::string TaskPadParameters::getReferenceAxis(void) const

src/Mod/PartDesign/Gui/TaskPocketParameters.cpp

@@ -650,7 +650,8 @@ bool   TaskPocketParameters::getAlongSketchNormal(void) const
 
 bool   TaskPocketParameters::getCustom(void) const
 {
-    return ui->checkBoxDirection->isChecked();
+    // index 2 is hardcoded to custom vector
+    return ui->directionCB->currentIndex() == 2 ? true : false;
 }
 
 std::string TaskPocketParameters::getReferenceAxis(void) const