Refresh Cue List Widget on Addition or Removal of a Step from Chaser

[lilyCalla]

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• Currently adding or removing a widget is not reflected in the cue list widget unless the project is saved and reopened
• Also apparent cause of crash at https://www.qlcplus.org/forum/viewtopic.php?t=17147, as the cue list would attempt to access a non-existent index
• This PR reloads the chaser cue list if a function is added or removed from the linked chaser, allowing updates to be seen in real time and preventing the crash

[coveralls]

coverage: 32.014% (-0.05%) from 32.065% when pulling 9805f86cc6914dbdc339aea53e2dbdaa3c286a37 on lilyCalla:cuelist-refresh into 01fdda185ed1c008e0605669ec29dac4963511aa on mcallegari:master.

[yestalgia]

Love your work @lilyCalla

[mcallegari]

Looks good, thanks 👍

[mcallegari]

Actually, I overlooked these changes.

• first signals should be using past form, so in chaser.h/cpp it's stepsListChanged, not stepListChange
• also, a signal to update the UI was already present: https://github.com/mcallegari/qlcplus/blob/master/qmlui/virtualconsole/vccuelist.h#L198

I think the only change needed in vccuelist.cpp is this:

connect(function, SIGNAL(stepsListChanged(quint32)),
        this, SIGNAL(stepsListChanged()));

Please try that and re-submit a new PR. Thanks

[mcallegari]

Nevermind, I sorted this myself.