fix: Avoid unexpected dialog shown.

[yanguoyu]

To avoid unexpected dialog that notifies the user of an external node shown.

1. Set the process to null when the started pid equals the current process pid.
2. Stop the get tip number when switching the network and start after starting the node.
3. Add debounce time to start node, that is avoid the user switching the internal network faster.

[yanguoyu]

/package
Packaging for test is done in 6822238187. @yanguoyu

[Keith-CY]

In what situations will the dialog be displayed mistakenly?

[yanguoyu]

In what situations will the dialog be displayed mistakenly?

When the connectionStatusSubject broadcasts true for the last selected node. So I restart the subscribe which gets the tip number when the network switches.

[Keith-CY]

In what situations will the dialog be displayed mistakenly?

When the connectionStatusSubject broadcasts true for the last selected node. So I restart the subscribe which gets the tip number when the network switches.

Got it

[silySuper]

/package
Packaging for test is done in 6938651819. @silySuper