+++ This bug was initially created as a clone of Bug #1791657 +++

Description of problem:
OperatorHub > Operator Subscription > Create Operator Subscription on the web, is prior to "Update Channel" now, take local storage operator for example. it can only be installed in specific namespace, after choosing the expected namespace, then if "update channel" need to be modified, the "Installation Mode" will be back to the default option(all namespace). 
Also from the configuration side, "Update Channel" has a higher level than "Installation Mode"

Version-Release number of selected component (if applicable):
OCP4.3

How reproducible:
Always

Steps to Reproduce:
See Description.

Actual results:
"Installation Mode" is prior to "Update Channel"

Expected results:
"Update Channel" is prior to "Installation Mode"

Additional info:
Comments from jiazha: the "Installation Mode" definiation located in the CSV file, and the "Update Channel"s in the package file which located in the parent folder. So, for me, I think the first step should be choosing the Channel.