In Jira Software, it would be useful to have options for "Top of this Sprint" and "Bottom of this Sprint" in the "Move to" context menu options when right-clicking on an issue in a sprint in the Backlog view.
This is to help where there are large number of issues within a specific sprint.

Workarounds

• The best workaround possible is to use the keyboard shortcuts "s+t" and "s+b" after selecting a particular issue to move the issue directly to the top or directly to the bottom respectively.
• The second workaround is to drag and drop the issue in your sprint to change its position to the top or bottom of the sprint. 
• Alternatively, you can click on the ellipsis menu on an issue > Move to > and then click move up or move down one by one but it will be tedious if there are lot many issues in the sprint.