Add default properties to link buttons and remove redundant settings (#8151)

* Add font-size: inherit to link button

Remove redundant font-size settings

_FeedbackDialog.scss
_GenericFeatureFeedbackDialog.scss
_Login.scss
_NewRoomIntro.scss
_NotificationSettingsTab.scss
_PinnedEventTile.scss
_PreferencesUserSettingsTab.scss
_SpaceCreateMenu.scss
_ToastContainer.scss
_UserMenu.scss

Specify font-size
- _ProfileSettings.scss
- _SpaceBasicSettings.scss
- _SpaceSettingsDialog.scss

Signed-off-by: Suguru Hirahara <luixxiul@users.noreply.github.com>

* Add line-height: inherit to link button

Remove redundant setting
- _GenericFeatureFeedbackDialog.scss
- _PinnedEventTile.scss
- _SpaceCreateMenu.scss

Signed-off-by: Suguru Hirahara <luixxiul@users.noreply.github.com>

* Add font-weight: normal to link button

Remove redundant setting
- _SpotlightDialog.scss
- _UserMenu.scss

Signed-off-by: Suguru Hirahara <luixxiul@users.noreply.github.com>

* Dedupe _link and _link_inline

Signed-off-by: Suguru Hirahara <luixxiul@users.noreply.github.com>

* Set inline to "link_inline"

Treat the button as its name indicates.
For elements that should not be inlined, "link" should be used.

Signed-off-by: Suguru Hirahara <luixxiul@users.noreply.github.com>

res/css/views/spaces/_SpaceCreateMenu.scss

@@ -93,10 +93,6 @@ $spacePanelWidth: 68px;
             width: min-content;
         }
 
-        .mx_AccessibleButton_kind_link {
-            font-size: inherit;
-        }
-
         .mx_AccessibleButton_disabled {
             cursor: not-allowed;
         }
@@ -118,7 +114,5 @@ $spacePanelWidth: 68px;
     .mx_AccessibleButton_kind_link {
         color: $accent;
         position: relative;
-        font-size: inherit;
-        line-height: inherit;
     }
 }