Some RandomPatches Tweaks

[WaitingIdly]

changes in this PR:

• fixes the player model turning invisible occasionally when flying around with an elytra in third-person mode. (default: true)
• always returning the player to the main menu instead of the multiplayer screen or realms. (default: false)
• disables glint effect on potions. (default: false)
• improves the speed of switching languages. (default: true)
• prevents the observer being placed from activating itself (default: false)
• prevents placing a bucket inside a portal block (default: false)
• controls if the bottom of the end portal should be rendered (default: true)
• allows for rebinding a dismount key, separate to the crouch key. (default: false)
• allows for rebinding the narrator key, provided the narrator is not disabled. (default: false)
• in addition to these changes based on random patches, i also added a config option to disable the glint effect on enchantment books. (default: false)

this includes a number of changes that RandomPatches makes, but not all changes. the things RandomPatches changes but are not included here are:

• title and icon changes: setWindowIcon and defaultWindowTitle.
• framerateLimitSliderStepSize, smoothEyeLevelChanges, fixTickNextTickListOutOfSynch, miningGhostBlocksFix, isRecipeBookNBTFixEnabled, skullStackingFix, and patchEntityBoat.

this relates to the following discussions: #479, #347, #332, #206, and #50