Color cleanup number six (#7050)

* Remove $voip-decline-color and $voip-accept-color

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* Remove $dialog-background-bg-color

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* $mention-user-pill-bg-color -> $warning-color

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* $plinth-bg-color -> $secondary-accent-color

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* $input-lighter-fg-color -> $input-darker-fg-color

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* $input-valid-border-color -> $accent-color

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* $input-invalid-border-color -> $warning-color

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* $button-bg-color -> $accent-color

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* $avatar-bg-color -> $background

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* $preview-widget-fg-color -> $greyed-fg-color

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* $settings-profile-button-fg-color -> $settings-profile-overlay-placeholder-fg-color

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* $presence-online -> $accent-color

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* $pinned-unread-color -> $notice-primary-color

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* $event-highlight-fg-color -> $warning-color

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* $tab-label-active-bg-color -> $accent-color

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* $button-primary-bg-color -> $accent-color

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* $button-danger-bg-color -> $notice-primary-color

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* $button-link-fg-color -> $accent-color

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* $togglesw-on-color -> $accent-color

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* $slider-selection-color -> $accent-color

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* $progressbar-fg-color -> $accent-color

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* $authpage-body-bg-color -> $background

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* Fix merge issue

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

* Fix second merge issue

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

res/css/views/elements/_DirectorySearchBox.scss

@@ -25,7 +25,7 @@ limitations under the License.
     padding: 3px;
     padding-left: 10px;
     padding-right: 10px;
-    background-color: $plinth-bg-color;
+    background-color: $secondary-accent-color;
     border-radius: 3px;
     background-image: url('$(res)/img/icon-return.svg');
     background-position: 8px 70%;