Schedule order and worker fixes

Added buttons to change schedule order in schedule list. They appear when hovering a list entry.

Improved icons for playing pausing and speeding up the simulation.

It was a little difficult to determine what industries were unlocked by what cities. I made capital of a region pulse if an industry is unlocked. I made locked industries pulse when the capital of a region is hovered.

Indent train "Acceleration" text to make it clearer it is the limit on acceleration.

Made randomness in worker path positions not affect the time for workers to travel their paths.

Added an error if two train cars try to load or unload at the same platform tile. This should also be less likely to happen now due to other worker positioning changes.

Made loading a saved game close error dialog as well as some other dialogs. I don't close the level completion dialogue because it can be used to compare against different solutions.

Fixed that trains don't always stop exactly at signals. Now they will move up all the way to the end of the signal.

Changed the location the workers load a car from so that it will be perpendicular path from the platform tile if the train stops a signal that is at an integer location.

Fixed that box drag select onto a dialog title bar caused the dialog to move.

Prevent storage dialog from going off screen with UI scale greater than one hundred percent.

Exposed price balance settings. These are integers and the track cost is therefore a bit hard to fine-tune. Therefore, I also added a track length scale to allow finer tuning with floating point values.