Publish: Add length check for new channel names
Publish: Add length check for new channel names

MaxiBoether/lbry-app,akinwale/lbry-app,jsigwart/lbry-app,lbryio/lbry-app,MaxiBoether/lbry-app,jsigwart/lbry-app,jsigwart/lbry-app,akinwale/lbry-app,MaxiBoether/lbry-app,lbryio/lbry-app,akinwale/lbry-app,akinwale/lbry-app,jsigwart/lbry-app,MaxiBoether/lbry-app,lbryio/lbry-electron,lbryio/lbry-electron,lbryio/lbry-electron