PointSize -> PixelSize

[john-michaelburke]

• Unifies font sizes between all operating systems. Seems Mac doesnt quite respect pointSize and as far as I can tell treats it as pixelSize. So this converts all usage of pointSize to pixelSize and now they look similar.
• Adds a longtextfield check and multiplier to the "Description" section in Settings pane as a few were getting cut off. Checked most of them are now covered by this.
• Removes the logic we had for adding a scalefactor to our fonts based on operating system and "no-high-dpi".
• Also removes the pesky warning message: Both point size and pixel size set. Using pixel size.

Currently building a test release.

[john-michaelburke]

Here is a test release with the most recent changes:
swift-console_v4.0.3-pixelsize_linux.deb103 MB
swift-console_v4.0.3-pixelsize_macos.dmg63.9 MB
swift-console_v4.0.3-pixelsize_windows.exe