multi: Bug fixes and code improvements

[ukane-philemon]

This PR resolves a handful of bugs, code improvements on the CEX page, and minor dex improvements.

• assets/dcr: fix panic when sync is not active: This issue has been recurring but the fix has been included in this PR.

• libwallet: rework instantswap feature

• exchange: fix order detail page panic when fetching order returns an error

• multi: Fix CEX page

  • Fix asset selector dropdown
  • Fix asset amount input
  • Fix order schedular modal and balance to maintain field
  • Fix order settings modal
  • Handle error from failed order schedules

• fix contentious lock issue causing hang during dcr sync

• use midGap as default order rate for limit orders and minor code improvements

[dreacot]

i tried running the order scheduler

[ukane-philemon]

i tried running the order scheduler

Not sure why ltc is looking for an explorer but will check.

[dreacot]

2024-11-11 12:40:56.963 [INF] DLWL: Order Scheduler: get newly created order info
2024-11-11 12:41:02.764 [INF] DLWL: Order Scheduler: instantiate block explorer
2024-11-11 12:41:02.764 [INF] DLWL: Order Scheduler: verifying transaction with ID: 

the ID isn't shown

[dreacot]

2024-11-11 13:01:18.157 [INF] DLWL: order was completed successfully
2024-11-11 13:01:18.157 [INF] DLWL: Order Scheduler: creating next order based on selected frequency
2024-11-11 13:01:18.157 [INF] DLWL: Order Scheduler: the scheduler start time is equal to or greater than the frequency, starting next order immediately
2024-11-11 13:01:18.157 [ERR] DLWL: source wallet balance is less than or equals the set balance to maintain
2024-11-11 13:01:18.157 [INF] DLWL: Order Scheduler: exited

i think the message in the modal is misleading, because no indication the scheduler completed successfully

[ukane-philemon]

@dreacot both issues have been addressed in https://github.com/crypto-power/cryptopower/pull/696/commits/ac8e6533696cd474090b632213500aef7c155675