Clicking the install button for additional content multiple times installs the content multiple times

[erlehmann]

Minetest version

commit 413be76

Summary

In the content browser, I probably accidentally double-clicked the install button for the mod tnt_revamped and got an error message:

2021-11-30 20:48:21: ACTION[Main]: Installed package to /tmp/minetest/mods/tnt_revamped
2021-11-30 20:48:23: ERROR[Main]: MoveDir: target "/tmp/minetest/mods/tnt_revamped" exists as file or non-empty folder

I then deliberately triple-clicked the install button for the mod schemedit and got a message that it got installed multiple times within about a second:

2021-11-30 20:51:13: ACTION[Main]: Installed package to /tmp/minetest/mods/schemedit
2021-11-30 20:51:13: ACTION[Main]: Installed package to /tmp/minetest/mods/schemedit
2021-11-30 20:51:14: ACTION[Main]: Installed package to /tmp/minetest/mods/schemedit

Steps to reproduce

In the content browser, click very fast on the install button (a button with green plus sign) of a mod you have not yet installed.