fix: remove action container space in mobile

[hyj1204]

I removed the action container when there is no action(in mobile). The previous code still occupy a space when showActions is false

[codecov]

Codecov Report

Merging #135 (4f38d1f) into main (b3d4529) will decrease coverage by 0.02%.
The diff coverage is 33.33%.

@@            Coverage Diff             @@
##             main     #135      +/-   ##
==========================================
- Coverage   60.43%   60.42%   -0.02%     
==========================================
  Files         208      208              
  Lines        9320     9321       +1     
==========================================
- Hits         5633     5632       -1     
- Misses       3687     3689       +2     

Impacted Files	Coverage Δ
...onent/service/renderer/block_component_action.dart	14.28% <33.33%> (-5.72%)	⬇️