Issue 50926 - Remove dual spinner and other UI fixes
Description: Removed unnecessary spinner when loading the backup table.
Removed duplicate ID's from html
Revised Create Instance modal to be easier to read
Fixed typo in posix winsync fixup task help description
Removed unused CSS styles
Fixed plugin modal alignment issues
Fixed typo in Enable Replication modal
relates: https://pagure.io/389-ds-base/issue/50926
Reviewed by: spichugi(Thanks!)