Fixed normal bug EXT-6893 (Corrupted 'Connecting to conference' notification...

Fixed normal bug EXT-6893 (Corrupted 'Connecting to conference' notification is shown while connecting to ad-hoc voice chat).

Bug consisted of two problems- showing empty outgoing call floater and corrupted text in outgoing call floater. First was ad-hoc and group call specific and was caused by not showing appropriate text for STATE_READY voice channel state. Second was caused by too small space between "Connecting to..." and "Leaving..." textboxes, which enden in their collision for long names.

- First problem was fixed by adding STATE_READY case into appropriate switch where textboxes are made visible.

- Second was solved by placing "Leaving..." textbox lower

Reviewed by Vadim Sachuk at https://codereview.productengine.com/secondlife/r/310/

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branch : product-engine