No change in behavior. Replacing references with pointers allows Node interface
creation to be delayed until later during gui startup next commit to support
implementing -ipcconnect option
af112ab628 qt: Rename SetPrune() to InitializePruneSetting() (Hennadii Stepanov)
b0bfbe5028 refactor: Drop `bool force' parameter (Hennadii Stepanov)
68c9bbe9bc qt: Force set nPruneSize in QSettings after intro (Hennadii Stepanov)
a82bd8fa57 util: Replace magics with DEFAULT_PRUNE_TARGET_GB (Hennadii Stepanov)
Pull request description:
On master (5622d8f315), having `QSettings` set already
```
$ grep nPruneSize ~/.config/Bitcoin/Bitcoin-Qt-testnet.conf
nPruneSize=6
```
enabling prune option in the intro dialog
```
$ ./src/qt/bitcoin-qt -choosedatadir -testnet
```
![DeepinScreenshot_select-area_20191208120425](https://user-images.githubusercontent.com/32963518/70388183-eed68580-19b6-11ea-9aa1-f9ad9aaa68a6.png)
has no effect:
```
$ grep Prune ~/.bitcoin/testnet3/debug.log
2019-12-08T10:04:41Z Prune configured to target 5722 MiB on disk for block and undo files.
```
---
With this PR:
```
$ grep Prune ~/.bitcoin/testnet3/debug.log
2019-12-08T10:20:35Z Prune configured to target 1907 MiB on disk for block and undo files.
```
This PR has been split of #17453 (the first two commits) as it fixes an orthogonal bug.
Refs:
- https://github.com/bitcoin/bitcoin/pull/17453#discussion_r345424240
- https://github.com/bitcoin/bitcoin/pull/17453#discussion_r350960201
ACKs for top commit:
Sjors:
Code review re-ACK af112ab628
ryanofsky:
Code review ACK af112ab628. Just suggested changes since last review (thanks!)
promag:
Tested ACK af112ab628. Latest suggestions and changes look good to me.
Tree-SHA512: 8ddad34b30dcc2cdcad6678ba8a0b36fa176e4e3465862ef6eee9be0f98d8146705138c9c7995dd8c0990af41078ca743fef1a90ed9240081f052f32ddec72b9
QApplication takes the command line arguments and parses them itself
for some built in command line arguments that it has. We don't want
any of those built in arguments, so instead give it dummy arguments.
0dd9bdefa gui: Refactor to use WalletController (João Barbosa)
8fa271f08 gui: Add WalletController (João Barbosa)
cefb399e2 gui: Use AutoConnection for WalletModel::unload signal (João Barbosa)
Pull request description:
This PR is a subset of the work done in the context of #13100. This change consists in extracting from the application class the code that manages the wallet models.
The role of the `WalletController` instance is to coordinate wallet operations and the window.
Tree-SHA512: 6a824054376730eb7d16c643dd2003f5f60778e8ad3af707b82bc12c48438db179ca4446316b28fb17b206f4b9aba8998419aab8c5dd1f7c32467015732b5094