Change display of reset button to avoid having two buttons on same level
![image](https://github.com/Piwigo/Piwigo/assets/54360213/2dadcacc-a944-4939-a63c-a4ee1fbe46c5)

Batch manager single mode submit and reset button same level
This is a GitHub Issue
repo:Piwigo
owner:Piwigo
Title : Batch manager single mode submit and reset button same level
Issue date:

--- start body ---
Change display of reset button to avoid having two buttons on same level
![image](https://github.com/Piwigo/Piwigo/assets/54360213/2dadcacc-a944-4939-a63c-a4ee1fbe46c5)

--- end body ---

None