fix: --slider has no visual feedback (ticks not changing) and related doc
- Set ticks interval for slider
- Add doc
--slider text min max step
Notes:
- the
(arguments ...)is consistent with other --help messages - the
cerr<< Syntax:is consistent with other Syntax error reporting
Accompanying doc change to close the bug reports documentation/develop-kde-org!289 (merged)
Edited by shenleban tongying