Track Map: General improvements and bugfixes

[tomas-nestorovic]

This topic includes everything around current implementation of the Track Map. This, however, excludes any eventual modifications tailored for a particular container (e.g. KryoFlux in the future) - these should be committed in their own issues.
The general modifications of the Track Map should include all of these improvements:

• ✔ zooming sectors in and out (for instance for the whole track to fit in the window width),
• add legend on which color represents what kind of sector (e.g. purple means system sector, blue means occupied one, etc.),
• add "cursor" to show on which sector the cursor is currently hovering (to facilitate interpretation of information shown in the status-bar),
• show FAT path along with its eventual error (black if FAT path OK, red otherwise),
• add settings of Track Map tab; one of them should be the color of rectangle drawn around belonging to files selected in the File Manger, the other setting should be whether the rectangle should blink,
• ✔ add horizontal scroll-bar,
• add command "Go to cylinder"; in the shown dialog, add check-box to "Show the cylinder on top of the window, if possible" (otherwise show it in the vertical centre of the window) - a handy option for working with real media,
• add option to group by cylinders (the default) or heads,
• ✔ add display of timing of sectors on each track,
• add "double-view" on the same data (e.g. as in Visual Studio one can have two views at the same source code),
• ✔ add "Ignore file selection" option to speed up the drawing if the directory, from which files have been selected, contains too many files,
• usage of the Header common control to display the labels of columns, which remains always on top