Add moving trace shortcut

This commit add a feature where if you press Ctrl, you can move the trace by clicking and moving the mouse.

approved this merge request

changed milestone to %Vite 1.4

@cordronn please rebase manually this MR, it fails from the web interface

@faverge are you OK with this MR? I let you merge it (or at least approve) once Camille rebased it.

added 3 commits

• cfcb8066...0ccffe44 - 2 commits from branch solverstack:master
• 58602b4e - Add moving trace shortcut

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added 5 commits

• 58602b4e...7c0118f0 - 4 commits from branch solverstack:master
• 29558bed - Add moving trace shortcut

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added 3 commits

• 29558bed...a30abf26 - 2 commits from branch solverstack:master
• dfe29acb - Add moving trace shortcut

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approved this merge request

added 3 commits

• dfe29acb...5de94875 - 2 commits from branch solverstack:master
• 7ece050f - Add moving trace shortcut

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mentioned in commit a9896f4e

merged