Display watch help [FLAGS] before target

[poornas]

Fixes #2213 to standardize help message across mc commands.

[codecov-io]

Codecov Report

Merging #2220 into master will decrease coverage by 0.21%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master   #2220      +/-   ##
=========================================
- Coverage    9.02%   8.81%   -0.22%     
=========================================
  Files          93      93              
  Lines        6902    9021    +2119     
=========================================
+ Hits          623     795     +172     
- Misses       6152    8099    +1947     
  Partials      127     127

Impacted Files	Coverage Δ
cmd/watch-main.go	0% <ø> (ø)	⬆️
cmd/session.go	35.89% <0%> (-6.48%)	⬇️
cmd/config-utils.go	73.91% <0%> (-6.09%)	⬇️
pkg/hookreader/hookreader.go	19.23% <0%> (-5.77%)	⬇️
cmd/client-url.go	56.52% <0%> (-4.8%)	⬇️
cmd/humanized-duration.go	59.57% <0%> (-4.53%)	⬇️
cmd/config.go	20.56% <0%> (-1.4%)	⬇️
pkg/ioutils/filepath.go	13.63% <0%> (-0.91%)	⬇️
cmd/pretty-table.go	82.85% <0%> (-0.48%)	⬇️
pkg/console/console.go	6.4% <0%> (-0.14%)	⬇️
... and 80 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 8d7888e...26dc314. Read the comment docs.

[vadmeste]

LGTM

[deekoder]

merging because code coverage report seems incorrect.