fix: properties window not opening (#131)

Fixes the issue that wasn't able to open properties window in some occasions.

Use VS 2019

Merge pull request hampusborgos#239 from hjnilsson/make_spawns_visible

Make spawns visible when placing a new spawn.

Do not draw hook indicators in far zoom. (hampusborgos#229)

Fix view fails when using transparency, sync animation. Closes hampus…

…borgos#189

Update change log.

Ctrl+Shift is already used, changed shortcut to Ctrl+Alt+Click. #105

Prepare release 3.0