See the images below. As I keep on entering some text in the Entry, its size increases resulting in removing the "+" button that I have on the left. After the "+" button is completely off-screen, the Entry text starts scrolling (left most text starts going off screen but can be seen if we move the cursor.)
I want to fix the entry size such that it doesn't resizes after the initial layout. Thanks for your help!! 
Short text in Entry:
Large Text in Entry:
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