api Gap_add: on adding gap before 1st line, adjust scroll pos
api Gap_add: on adding gap before 1st line, adjust scroll pos

vhanla/CudaText,Alexey-T/CudaText,vhanla/CudaText,Alexey-T/CudaText,Alexey-T/CudaText,vhanla/CudaText,Alexey-T/CudaText,vhanla/CudaText,vhanla/CudaText,Alexey-T/CudaText,vhanla/CudaText,Alexey-T/CudaText,vhanla/CudaText,vhanla/CudaText,vhanla/CudaText,vhanla/CudaText,Alexey-T/CudaText,Alexey-T/CudaText