Improve layout of demo browser buttons, search and checkbox. Use icons for most buttons. Decrease size of UI elements.
Move demo details from below the file browser to a side panel on the right, which is the same size as the server browser side panel. Use ellipsis to truncate the SHA256 instead of rendering only half of it with reduced font size. Show "map not included" instead of "0.00 KiB" for the map size of demos that don't include a map.
Remove the "Markers" column, as it is not very useful to see for all demos and sort by.
Closes#7275.
When using the demo filter and the selected demo name does not match any visible demo item, temporarily reset the selected demo index instead of keeping an incorrect demo index. This makes the behavior consistent with the server browser.
The popup to show the completed demo rendering was also shown when the demo to be rendered could not be loaded or if the demo render popup was cancelled. Now the popup is only shown when the demo rendering was successful.
The layout of the popup is made consistent with other message popups. Long text is wrapped over multiple lines instead of decreasing the font size.
Simplify the usage of datafile reader and writer by adding utility functions to read and write zero-terminated UTF-8 strings.
Improve validation of string data read from datafiles. It is ensure that string data is null-terminated, has no internal NUL-characters and is valid UTF-8.
Fix loading of external sounds in the editor. The wrong path variable was being used, so the sound files would not be loaded from correct folder.
Add tests for new datafile reader/writer functions.
Store client IDs of all victims for team killmessages instead of storing only the first victim ID, so the render info for all victims can be properly restored when skins are updated.
Ensure all killmessages are properly initialized.
Avoid duplicate `SetColor` calls in loop.
Avoid `QuadsDrawTL` calls by batching quads together before drawing.
Use `SetColor` instead of `SetColorVertex`.
Remove unnecessary check for duplicate menu images. Listing directories with the storage now prevents duplicates, so this additional check is not needed anymore.
Ensure menu images are in RGBA format.
Ensure menu image names are not truncated.
Minor code format improvements.
The server list was being resorted every frame when the server details of a favorite server were being rendered, which was causing the FPS to drop by a factor of 5.
ChillerDragon
