Circleguard

* add player whitelist file which allows you to whitelist certain player ids from appearing in investigations. Hover over the blue question mark in the player whitelist file setting for instructions on setting up a whitelist file
* add option to turn off the alert played when a result is found
* add a "clear results" button to results tab
* add button to reset thresholds in the thresholds tab
* add thresholds for min snaps and min snaps display (1 by default)
* reduce default similarity threshold to 15 and similarity display threshold to 16
* allow mods to be lowercase as well as uppercase
* fix error when switching type of loadable between runs
* remove duplicate replays before investigating. This means, for instance, that a replay will no longer show up as 0.0 sim against itself
* fix circleguard not responding correctly to window's zoom settings

* visualizer now lets properly you view all negative time frames, and starts at the lowest negative frame instead of 0
* display distance to nearest hitobj in the visualizer
* increase default window size slightly so two loadables can fit side by side
* don't show scary JSONDecodeErrors errors when no error has actually occurred
* fix snaps rarely being counted off hitobjs even when "ignore snaps not on hitobjs" was checked
* hopefully fix circleguard not running on apple silicon macs by upgrading from PyQt5 5.14.2 to 5.15.2

* add option to ignore snaps that don't occur on hitobjects (enabled by default)
* replays played with HR are now shown correctly (ie flipped) when visualizing. If multiple replays are visualized and only one has HR, all replays are still flipped
* don't create a new loadable when "Select a Loadable" is re-selected
* display a nicer error message when non-std replays are investigated
* use cleaner links to maps and replays in templates

* fix local replays not thinking it was filled if you selected the default folder
* don't require disabled loadables to be filled
* fix some beatmaps not parsing correctly (https://github.com/llllllllll/slider/issues/71)
* fix `circleguard://` url erroring if log level was set to TRACE
* fix problematic replays potentially being removed twice and erroring

* **fix a memory leak** that occurred when deleting loaded loadables
* **ability to selectively disable loadables** (signified by a blue check or red X). Additionally:
- shift+clicking the blue check will disable all loadables other than the one you clicked
- shift+clicking the red X of any disabled loadable will re-enable all loadables
* put most recent runs at the top of the Queue tab instead of the bottom
* rewrite introduction page that shows to new users

* new Investigations screen which doesn't require drag and drop
* add hotkeys for creating loadables:
* <kbd>R</kbd> - creates a Map Replay
* <kbd>L</kbd> - creates a Local Replay
* <kbd>M</kbd> - creates a Map
* <kbd>U</kbd> - creates a User
* <kbd>A</kbd> - creates a All User Replays on Map
* show a pointer cursor on hover of clickable widgets
* save window size and position across restarts
* add mods of each replay to `circleguard://` urls
* display frametime difference in replay data
* skip ur calc for replays on maps with bugged downloads
* update threshold tab separator names
* prevent scrolling from activating dropdowns
make "Copy Template" button slightly bigger