Add overlay to queue lever pull jobs from linked building view

[pajawojciech]

How it works

• New overlay display button next to lever in 'Show linked buildings' tab.
• Button show lever status indicator: slash or backslash, representing current position of lever.
• Button adds / removes pull lever jobs
• Works fine even with more than one linked levers.

Click button

After click text changes to "Pulling" with yellow color, and job is queued. Now you can click again if you change your mind - it removes queued job.

Job assigned

When job is assigned text changes color to green:

Pulled

After pull text, color and indicator changes

When Unlink is enabled button moves to the left

What I tried

Instead of pull text i tried to set Open / opening / close / closing labels. For standard bridges it works fine, but for example retracting bridges or cages should have reversed operation naming, so I use 'Pull' text and lever position indicator

Issue

#3938