New Features, Bug Fixes

Fixed:

- Stored values now reset after pressing "Calculate" thus eliminating the problem where adding another segment after calculating and pressing calculate again would give an incorrect value.

Added:

- Replacing. You can now choose a segment and replace what is written there, undo last action also works with this new feature.

Changed:

- Added limits to the Input Areas so that you can only type numbers and limit the amount of characters that can be typed.

- Moved several elements around.

- Added version number and added "Time Without Loads Calculator" in the background.

- Can now no longer open the list of segments unless there is at least 1 segment.