This PR does the following:
The XML layout of Leave form page has been made along with minor fixes in the code. Also made 2 drop down menus for department box and leave type box;
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[ x] The PR title starts with "Fix #bugnum: ", followed by a short, clear summary of the changes. (If this PR fixes part of an issue, prefix the title with "Fix part of #bugnum: ...".)
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Proof that changes are correct
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