Feature request

Is your feature request related to a problem? Please describe.
There is no official way to set the initial mode in copter. Plane and Rover got a parameter and start on INITIALIZE mode.
On Copter, STABILIZE is set by default. The current method to set an initialization mode is to rely on FLTMODE1.

But in case FLTMODE_CH = 0, FLTMODE1 isn't called and you are stick to

void AStarExpansion::add(unsigned char* costs, float* potential, float prev_potential, int next_i, int end_x,  int end_y)
{
    .........
    if(costs[next_i]>=lethal_cost_ && !(unknown_ && costs[next_i]==costmap_2d::NO_INFORMATION))
        return;
    potential[next_i] = p_calc_->calculatePotential(potential, costs[next_i] + neutral_cost_, next_i, prev_potential);
     .......
}

Hi, I got a problem similar to #804.

My bridge did not connect correctly.
I have followed the latest tutorial and build Apollo successfully today.
My apollo did not connect in the following step.

Launch bridge (inside docker container):
./scripts/bridge.sh

I would need to add sudo in order to start my bridge.sh.
After adding that, there was no information print out from the terminal.

Python users are used to using getters and setters to access properties of objects.
See for example #1687.
Such getters and setters are not implemented in the Webots Python API.
They could be easily added. See https://www.geeksforgeeks.org/getter-and-setter-in-python for reference.