Auto-size grid rows to ensure high-DPI visibility of checkboxes

[HebaruSan]

Problems

• If you install the .deb on Linux without mono-complete, runing CKAN throws an exception:

  System.IO.FileNotFoundException: Could not load file or assembly 'System.ComponentModel.Composition, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies.
  File name: 'System.ComponentModel.Composition, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'
  

• Discord user Jonno reported that the checkboxes in the main mod list sometimes don't show up on a 189 DPI monitor with 150% UI scaling.
  
• After a failed install, toggling the auto-installed checkboxes for installed mods doesn't work as expected. Mods that were marked as auto-installed before the failed install will still be auto-removed when their depending mods are removed, even if you change them to not-auto-installed.
  

Causees

• Apparently when dotnet compiles for net481 on Windows, it generates a build that needs more dependencies than when Mono compiles for net481 on Linux, since we don't use System.ComponentModel.Composition explicitly anywhere in our own code.
• Presumably the grid rows are not scaled proportionally to the UI/font scaling by default.
• GUIMod.InstalledMod becomes stale when an installation failure causes the current Registry to be restored from its internal backup. A new InstalledModule is deserialized and used by the registry, and meanwhile the corresponding GUIMod retains a reference to the old object, so when it changes that object's AutoInstalled property, the registry's object still has the old value.

Changes

• Now libmono-system-componentmodel-composition4.0-cil is added to the dependencies of the .deb package. In my testing, this makes CKAN work properly after sudo apt install ckan on a fresh Ubuntu.
  Fixes FileNotFoundException: Could not load file or assembly 'System.ComponentModel.Composition on Linux #4600.
• Now the mod grid's AutoSizeRowsMode property is set to DisplayedCellsExceptHeaders, which Jonno reported fixes the issue. The DefaultCellStyle.Padding property is set to try to keep the appearance rougly the same, since by default the auto-sizing packs the rows more tightly.
  Fixes [Bug]: Checkboxes disappear at higher windows scalings #4629.
• Now GUIMod.InstalledMod is retrieved from the Registry on the fly as needed, so it will always return the currently correct object.
  Fixes CKAN still attempts to remove an auto-installed mod after explicitly trying to keep it after uninstall failure #4626.