TraceInstructionsWindow issues

[korcankaraokcu]

• Executing any gdb command while tracing instructions will make gdb unable to stop the process again
• Killing or forcing process to continue will make the wait dialog uncancellable, stuck at "processing data"
• Visibility issues when background isn't white, LoadingDialog could be changed as well

[korcankaraokcu]

Also, apparently recently introduced background execution completely broke this feature, it will be most likely replaced with the built-in tracer of GDB

[korcankaraokcu]

Apparently built-in tracer can only be used for remote targets. A workaround could be sending back control to pince on breakpoint trigger and execute tracing commands out of the gdb api but this is much slower than doing it in a single command with gdb api. There must be a more elegant way to fix this

[korcankaraokcu]

Tracer now works, apparently there wasn't a more elegant solution to this. Fixed the visibility issues as well. First two issues in the list are remaining

[korcankaraokcu]

All fixed