[chirp_devel] Information Prompt Patch

[Rick DeWitt]

OK, mercurial has been giving me fits trying to split these changesets 
out. So here is a combined patch with the diffs for chirp_common, 
mainapp and the lt725uv driver. All in support of issue #5889, adding 
the information prompt at download.
I'm still trying to get the ft450d driver change (adding the info prompt 
verbage) to process, keep getting -
"abort: working directory revision is not qtip" from the "hg qnew -ef 
ft450d_info" cmd.

-- 
Rick DeWitt
AA0RD
Sequim, Washington, USA
360-681-3494