This will fix the issue of the tray container not being
properly reconfigured when a tray client fails to be added
or removed.

### Breaking Changes:
None

### Changelog

**New Config Options**
The following config options were added

In the `[settings]` section:
* `pseudo-transparency`

In `internal/cpu`:
* `ramp-coreload-spacing`, spacing between elements in `<ramp-coreload>` elements
* `%percentage-sum%` in `label`. Shows sum of all percentages

In `custom/script`:
* `double-click-left`
* `double-click-middle`
* `double-click-right`

In `internal/pulseaudio`:
* `interval`, volume increase and decrease steps in percentage points

In `internal/memory`:
* `bar-swap-used`
* `bar-swap-free`
* `ramp-swap-used`
* `ramp-swap-free`

**Deprecations**
* `tray-transparent` in the bar section is no longer used. The tray now always uses pseudo-transparency

**Features**
* volume: adjustable volume steps (#1364), see #1361
* memory: Add progress bars and ramps for swap (#1325)
* render: pseudo-transparency (always used in the tray)  (#595)
* cpu: 
    * Configurable spacing in between coreloads (#1472), see #1389
    * Non-normalized cpu load (#1517), see #1516
* script: Double click actions (#1442)
* net: Support for bridge interfaces (#1528), see #1522
* token: zero pad tokens when min-width value starts with a `0` (#1341), see #1332

**Fixes**
* config: Use font patterns detected on system in sample config (#1350)
* net: Disconnected module when SSID is only an emoji (#1371), see #1367
* tray: Tray overlapping with bar (#1392), see #591
* build: Several build errors (#1395, #1454, #1470, polybar/xpp#12, #1493), see #1447, #1469, #750, #1492
* mpd: format-online-prefix not working (#1402), see #1399
* font: Crash for some font-patterns (#1451), see #1435
* script: 
    * Only `%counter%` or `%pid%` token usable, never both (#1456)
    * click actions with colons in them (#1457), see #984
* renderer: Bar locks up when xorg composite extension is disabled (#1430), see #1425