Added missing function declaration/comments

Author: SebastianLievano

vpr/src/draw/search_bar.h

@@ -31,14 +31,19 @@ void search_type_changed(GtkComboBox* /*self*/, ezgl::application* app);
 /*function below pops up a dialog box with no button, showing the input warning message*/
 void warning_dialog_box(const char* message);
 
-void key_length_val_changed(GtkSpinButton* self, ezgl::application* app);
-
+//Returns pb ptr of given atom block name
 t_pb* find_atom_block_in_pb(std::string name, t_pb* pb);
 
+//Highlights atom block in cluster block
 bool highlight_atom_block(AtomBlockId atom_blk, ClusterBlockId cl_blk, ezgl::application* app);
 
+//Turns on autocomplete/suggestions
 void enable_autocomplete(ezgl::application* app);
 
+//Simulates key press event 
+GdkEvent simulate_keypress(char key, GdkWindow* window);
+
+//Returns current search type
 std::string get_search_type(ezgl::application* app);
 #endif /* NO_GRAPHICS */