ProTracker 2 clone v1.62

• Bugfix: It was possible to scroll out of bounds in Disk Op. by using shift+key
• Bugfix: Don't set "song unsaved" flag if text editing didn't make a change
• Bugfix: Editing the Disk Op. path text would set the "song unsaved" flag (lol)
• Bugfix: Using the "CLEAR" button while Edit. Op. or the about screen was open could lead to a screen redrawing issue
• Disk Op. file entry jumping (left shift + key) now works a bit differently. If the last pressed jump key didn't change, cycle through pages if there are more matches to be found. This allows for quicker module finding. Thanks to Fireb0y for this suggestion! I know I usually do not accept requests, but this one was simple and very useful
• Re-implemented the Pos Ed. pattern naming feature. Be aware that this data is not saved to the module, and is only used to temporarily keep track of the patterns while making the module. Yes, it's a quite crippled feature, but some people asked me to implement it again!
• Code refactoring, a small portion of the code should be easier to understand now (still a long way to go...)
• Windows/macOS: Updated SDL to v2.28.2