Revert "convert two-way roadlink into two one-way roadlinks" changes.

Revert parts of "Fix unselection of speed limit when changing to edit mode"

This partially reverts commit 5b26a97bff59fadc9be966f8c38463cabe7a83d8.

Only reverts the parts that were related to reverted changes, not the actual fix.

Revert "Show convert into two one-way speed limits button only for two-way speedlimits"

This reverts commit a49178c9b9f4ad7d4e5216b4c327b0621b6db37d.

Revert "Improve text on the button"

This reverts commit 585d7efe64c0f2f69918ba50d4abd8d4c29793b0.

Revert "Apply styles to button"

This reverts commit c2e0460a8723ed273ef10daaf3cd6523dc03032b.

Revert "Reword element class"

This reverts commit 609908e73c80ea547dbce3aea4460ea6668c646f.

Revert "Add button to turn two-way speed limit into two one-way speed limits"

This reverts commit ae66524a0743ab3b3d53762bfc7a0bcb7e6b1b91.