Website: Update modals on mobile safari (#19628)

Related to: https://github.com/fleetdm/fleet/issues/19584
Closes: https://github.com/fleetdm/fleet/issues/19624

Changes:
- Updated the modal component to remove a workaround for an ios 11 bug
that has been resolved in the versions of IOS that the Fleet website
supports

website/assets/js/components/modal.component.js

@@ -34,7 +34,6 @@ parasails.registerComponent('modal', {
       // but still.... better safe than sorry!)
       _bsModalIsAnimatingOut: false,
 
-      isMobileSafari: false,//« more on this below
       originalScrollPosition: undefined,//« more on this below
     };
   },
@@ -60,25 +59,6 @@ parasails.registerComponent('modal', {
   //  ║  ║╠╣ ║╣ ║  ╚╦╝║  ║  ║╣
   //  ╩═╝╩╚  ╚═╝╚═╝ ╩ ╚═╝╩═╝╚═╝
   beforeMount: function() {
-    // If this is mobile safari, make note of it.
-    this.isMobileSafari = (typeof bowser !== 'undefined') && bowser.mobile && bowser.safari;
-    // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-    // ^^So there's a bug in mobile safari that misplaces the caret when the keyboard opening
-    // causes the page to scroll, so we need to do some special tricks to keep it from getting ugly.
-    // It's only in iOS 11... we think.  Hopefully it will be fixed.
-    // In the mean time, we have to get wacky.
-    //
-    // > More info about the bug here:
-    // > https://github.com/twbs/bootstrap/issues/24835#issuecomment-345974819
-    // > https://stackoverflow.com/questions/46567233/how-to-fix-the-ios-11-input-element-in-fixed-modals-bug?rq=1
-    //
-    // FUTURE: maybe the bug will be fixed and we can remove this someday?
-    // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-
-    if(this.isMobileSafari) {
-      // Get our original scroll position before opening the modal and save it for later.
-      this.originalScrollPosition = $(window).scrollTop();
-    }
   },
   mounted: function(){
     // ^^ Note that this is not an `async function`.
@@ -100,26 +80,6 @@ parasails.registerComponent('modal', {
     // the parent logic can use this event to update its scope.)
     $(this.$el).on('hide.bs.modal', ()=>{
 
-      // Undo any mobile safari workarounds we may have added.
-      // (i.e. shed the wackiness)
-      if(this.isMobileSafari) {
-        // Remove style overrides on our modal dialog.
-        $(this.$el).css({
-          'overflow-y': '',
-          'position': '',
-          'left': '',
-          'top': '',
-        });
-
-        // Beckon to our siblings so they come out of hiding
-        this.$get().parent().children().not(this.$el).css({
-          'display': ''
-        });
-
-        // Scroll to our original position when the modal was summoned.
-        window.scrollTo(0, this.originalScrollPosition);
-      }//fi
-
       this._bsModalIsAnimatingOut = true;
       this.$emit('close');
 
@@ -131,40 +91,6 @@ parasails.registerComponent('modal', {
     // us to do cool things like auto-focus the first input in a form modal.
     $(this.$el).on('shown.bs.modal', ()=>{
 
-      // If this is mobile safari, let's get wacky.
-      if(this.isMobileSafari) {
-        // Scroll to the top of the page.
-        window.scrollTo(0, 0);
-        // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-        // ^^FUTURE: Don't actually do this -- instead, try setting `top` of the
-        // modal to whatever the original scrollTop of our window was.  This
-        // eliminates the need for auto-scrolling to the top and ripping you out
-        // of the context you were in before the modal opens.  It would also allow
-        // us to keep the nice animation when opening/closing modals on iOS.
-        // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-
-        // Hide siblings to lop off any extra space at the bottom.
-        this.$get().parent().children().not(this.$el).css({
-          'display': 'none'
-        });
-        // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-        // ^^FUTURE: Instead of just hiding siblings, which isn't perfect and won't
-        // always work for everyone, try grabbing outerHeight of the modal element
-        // and using that to set an explicit height for the body.
-        // (but also be sure to handle the case where the body is short!)
-        // But for now, this should work as long as we have sticky footer styles.
-        // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-
-        // Hard code some style overrides on our modal dialog.
-        // Without these, it gets weird.
-        $(this.$el).css({
-          'overflow-y': 'auto!important',
-          'position': 'absolute',
-          'left': '0',
-          'top': '0',
-        });
-      }//fi
-
       // Focus our "focus-first" field, if relevant.
       // (but not on mobile, because it can get weird)
       if(typeof bowser !== 'undefined' && !bowser.mobile && this.$find('[focus-first]').length > 0) {