This commit changes the land rights button in the park window to be
disabled if there are no more land rights and construction rights for
sale. It also disables the individual land rights and construction
rights buttons in the land rights window itself if that specific type of
tile is no longer for sale.
This is implemented by introducing two new global variables called
gLandRemainingOwnershipSales and gLandRemainingConstructionSales. These
are updated by map_count_remaining_land_rights() to contain the number
of land rights and construction rights that remain for sale. This
function is called when a scenario is loaded and whenever the game
command to buy land rights or construction rights is invoked.
It also introduces three new tooltip strings that explain why the
buttons are disabled.
This commit also renamed a flag, and corrected the use of one. The
flags in question are WALL_SCENERY_BANNER, WALL_SCENERY_2_FLAG4, and
WALL_SCENERY_2_FLAG5.
These defines are used to calculate the edges of the widgets. They are
now ordered in the same way the widgets are listed for the pages.
This commit also adds some extra defines, to make it more easy to tweak
the sizes and padding of widgets.
Corrupt elements are now placed right under the selected element
Local tile-inspector variables now all use camelCaseNames
Removed unused string, and shifted string IDs
