CHUI-821 ADD FIX Conversation size regression when logging out with...

CHUI-821 ADD FIX Conversation size regression when logging out with conversation list minimized to icons:
deleted redundant savings of the convers. panel width;
added a manually reshape of the conv. panel after change it's collapse state;
function with uninformative name "updateState" was renamed to "reshapeFloaterAndSetResizeLimits"