[Feature] Introduced option to control amount of internal bridging, fixing internal bridge missing for some sloped surfaces (#3319)

* ENH: Improve internal bridge detection for sloped surfaces

* Moved lightning detection out of the parallel threads

* Naming conventions

* Revised approach - use reduced expansion multipliers

* Further reduce filtering, flagged option as experimental

* Corrected code comment

* Updated tool tip

* Introduced filtering drop down option

src/libslic3r/PrintConfig.hpp

@@ -152,6 +152,10 @@ enum SeamPosition {
     spNearest, spAligned, spRear, spRandom
 };
 
+enum InternalBridgeFilter {
+    ibfDisabled, ibfLimited, ibfNofilter
+};
+
 enum LiftType {
     NormalLift,
     SpiralLift,
@@ -744,6 +748,7 @@ PRINT_CONFIG_CLASS_DEFINE(
     // Orca internal thick bridge
     ((ConfigOptionBool,                thick_bridges))
     ((ConfigOptionBool,                thick_internal_bridges))
+    ((ConfigOptionEnum<InternalBridgeFilter>,  dont_filter_internal_bridges))
     // Overhang angle threshold.
     ((ConfigOptionInt,                 support_threshold_angle))
     ((ConfigOptionFloat,               support_object_xy_distance))