Fixes some keyboard issues

[diegosanchezr]

Fixes:
A)

1. Go to a chat conversation
2. Tap on textfield to open keyboard
3. Press return multiple times (until the textfield grows enough to show scroll indicators, and touches the navigation bar)
4. Reveal/Hide the predictive text bar above the keyboard

iOS 8: Keyboard moves up and down
iOS 9: App hangs due to infinite layout loop

B)
Steps as in A)
iOS 8: Keyboard jumps and creates a small gap at the bottom of the screen.
iOS 9: Cursor jumps slightly (not fixed)

C)

1. Go to a chat conversation
2. Tap on textfield to open keyboard
3. Paste a very long text (so textfield grows enough to show scroll indicators, and touches the navigation bar)
4. Select all text and remove
5. Paste again

iOS 8: Broken position for keyboard + textfield. Keyboard and textfield may appear in the middle of the screen for example
iOS 9: Broken textfield. It is not scrollable and can only see part of text. If you edit the text (remove a letter), then it fixes the issue and you can now scroll.

D)

1. Go to a chat conversation
2. Tap on textfield to open keyboard
3. Open Chinese (Traditional) - Zhuyin keyboard
4. Open full-screen chinese keyboard ( tap on ^ )
5. Drag the keyboard down by swiping down

Full-screen chinese keyboard will be misplaced with close arrow ( v ) not visible

Other related issues not fixed here

E)

1. Go to a chat conversation
2. Tap on textfield to open keyboard
3. Paste very long text (so textfield grows enough to show scroll indicators, and touches the navigation bar)
4. Open Chinese (Traditional) - Zhuyin keyboard
5. Open full-screen chinese keyboard ( tap on ^ )
6. Drag the keyboard down by swiping down

Full-screen chinese keyboard will be misplaced. It will be in the middle of the screen ( looks like as much as the textfield grows once it's placed at the bottom )

F)

1. Go to a chat conversation
2. Tap on textfield to open keyboard
3. Long press on a text message with a date
4. Choose "Create event" from action sheet
5. In the create event screen dismiss the keyboard
6. Cancel event creation

Input field is placed in the middle of the screen

[codecov-io]

Current coverage is 64.89%

Merging #115 into dev will increase coverage by +0.74% as of 425ec5f

@@              dev    #115   diff @@
=====================================
  Files          60      60       
  Stmts        3125    3131     +6
  Branches        0       0       
  Methods         0       0       
=====================================
+ Hit          2005    2032    +27
  Partial         0       0       
+ Missed       1120    1099    -21

Review entire Coverage Diff as of 425ec5f

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