ENH: Optimize and design the time-lapse wiper tower

Multiplex existing wipe tower and revert old time-lapse wipe tower code

Change-Id: Ia1cba9808647ea900f691b2c5d5887077be12d89
(cherry picked from commit 61f41df572d11b7cc738c34f2624fd123cd9a6df)

src/libslic3r/GCode/WipeTower.hpp

@@ -152,6 +152,8 @@ public:
 	// Iterates through prepared m_plan, generates ToolChangeResults and appends them to "result"
 	void generate(std::vector<std::vector<ToolChangeResult>> &result);
 
+	WipeTower::ToolChangeResult only_generate_out_wall();
+
     float get_depth() const { return m_wipe_tower_depth; }
     float get_brim_width() const { return m_wipe_tower_brim_width_real; }
 
@@ -263,7 +265,7 @@ private:
         return m_filpar[0].filament_area; // all extruders are assumed to have the same filament diameter at this point
     }
 
-
+	bool   m_enable_timelapse_print = false;
 	bool   m_semm               = true; // Are we using a single extruder multimaterial printer?
     Vec2f  m_wipe_tower_pos; 			// Left front corner of the wipe tower in mm.
 	float  m_wipe_tower_width; 			// Width of the wipe tower.